Showing posts with label Bank Exams. Show all posts
Showing posts with label Bank Exams. Show all posts

Sunday, 2 August 2015

SBI - Reasoning - 1

SBI _ Reasoning - 1

Directions—(Q. 1–5) Below in each question are given two statements (I) and (II). These statements may be either independent causes or may be effects of independent causes or a common cause. One of these statements may be the effect of the other statement. Read both the statements and then decide which of the following answer choice correctly depicts the relationship between these two statements.
Mark answer—
(A) if statement (I) is the cause and statement(II) is its effect.
(B) if statement (II) is the cause and statement(I) is its effect.
(C) if both statement (I) and (II) are independent causes.
(D) if both statements (I) and (II) are effects of independent causes.
(E) if both statement (I) and (II) are effects of some common cause.

1.       (I)  The government has amended tax laws to boost exports.
(II) The export sector has been passing through difficult times due to heavy tax burdens.
Ans : (B)

2.       (I)  Budgetary allocation for building a better railway network e.g. constructing new railway
       lines has increased.
(II) There has been a substantial drop in the number of passenger opting for air travel.
Ans : (D)

3.       (I)  The production of pulses has dropped for the third consecutive year.
(II) India has decided to import pulses this year.
Ans : (A)

4.       (I)  The Bank has provided a link on its website to obtain feed-back from customers.
(II) Customers have been complaining about poor services in the Bank’s branches.
Ans : (B)

5.       (I)  Indian citizens are willing to incur the cost of using environment friendly technology.
(II) Many countries are taking steps to cut their carbon emissions.
Ans : (E)

Directions—(Q. 6–10) In each question below is given a group of letters followed by four combinations of digits/symbols lettered (A), (B), (C) and (D). You have to find out which of the combinations correctly represents the group of letters based on the coding system and mark the letter of that combination as your answer. If none of the combinations correctly represents the group of letters, mark (E) i.e. ‘None of these’ as your answer.

Letter :                                 T    A    G    R    S    D    N    E    V     U    X    P
Digit/Symbol Code :         @    4    9    #    %    3    ©   5    1     β    7     6
Conditions—
(i) if the first letter is a consonant and the last letter is a vowel only the first letter may be coded and no code may be given to the last letter.
(ii) if both the first and last letters are vowels then both are to be coded as $.
(iii) if the first letter is a vowel and the last letter is a consonant then the codes are to be interchanged.


6.       DESGRT
(A)  35%9#
(B)  35%9#@
(C)  @5%9#3
(D)  359%#@
(E)  None of these
Ans : (B)

7.       NERSPU
(A)  @5#%6@
(B)  @5#56©
(C)  ©5#%6
(D)  ©5#%6β
(E)  None of these
Ans : (C)

8.       XNTPGA
(A)  7©@694
(B)  7©@964
(C)  4©@69
(D)  7©@69
(E)  None of these
Ans : (D)

9.       ESVNTU
(A)  $%1©@$
(B)  5%1©@β
(C)  $%1©@β
(D)  $%1©β 5
(E)  None of these
Ans : (A)

10.   UXPTGN
(A)  ©76@9β
(B)  $76@9©
(C)  β 76@9©
(D)  β 76@9B
(E)  None of these
Ans : (A)

11.   Four of the following five are alike in a certain way and so form a group. Which is the one that does not belong to the group?
(A) Tornado
(B) Volcano
(C) Storm
(D) Hurricane
(E) Cyclone
Ans : (B)

12.   How many such pairs of letters are there in the word EVAPORATE each of which has as many letters between them in the word as in the English alphabet?
(A) One
(B) Two
(C) Three
(D) Four
(E) More than four
Ans : (E)     ( OP,  POR,  PORAT,  VAPOR,  RAT  )

13.   How many meaningful four letter English words can be formed with the letters ITED using
each letter only once in each word ?
(A) None
(B) One
(C) Two
(D) Three
(E) More than three
Ans : (E)      ( TIDE,  EDIT,  DIET,  DITE,  TIED )

Directions—(Q. 14–15) Study the following information carefully to answer these questions.
A vehicle starts from point P and runs 10 kms towards North. It takes a right turn and runs 15 kms.  It
now moves 6 kms after taking a left turn. It finally takes a left turn, runs  15 kms  and stops at point Q.

14.   How far is point Q with respect to point P?
(A) 16 km
(B) 25 km
(C) 4 km
(D) 0 km
(E) None of these
Ans : (A)

15.   Towards which direction was the vehicle moving before it stopped at point Q?
(A) North
(B) East
(C) South
(D) West
(E) North-West
Ans : (D)





Sunday, 5 July 2015

English Verbal - 15 (for Bank Exams)

English – Verbal – 15 (for Bank Exams)

Directions—(Q. 1–15) Read the following passage carefully and answer the questions that follow:  
               
The great sage once had a group of disciples. They were all very bright and eager students and the sage had all the reasons to be proud of them. One day the sage realized that he had imparted enough knowledge to his disciples. Now they were all very learned. There was only one thing the sage had not taught them, and that was the special verse that could bring the dead back to life. The sage knew that such knowledge was too wonderful and could prove to be a dangerous thing in the hands of someone who was not very wise. The sage pondered over this for a long time. But he also knew that if he did not pass on this secret verse, it could die with him. So, at last he called his cleverest disciple aside and said “I am going to teach you a very special verse. If you chant this you can bring to life a dead person or animal. Use only when you need it to and never misuse or test your powers vainly.”

He then called all the disciples together and said, “I am sending you all into the forest for forty days. Go together and come back together. Each one of you has to guide one another and do good things.” So the disciples started out together into the forest. They were all united. But the clever disciple who knew the verse wanted to show he was better than the others. As they walked into the forest, they came across a dead tiger on the way. It was huge and looked wickedly fierce even when dead. The clever disciple stopped and said to the others. “Now I am going to show you what our teacher has taught me alone. He has taught me how to bring life back into the dead.” The others would not believe him and he said, “I would prove it to you by bringing this tiger back to life. “But other disciple said “do not do anything to prove your knowledge vainly. Moreover, if you put life into this tiger, it will only turn on us and kill us all. This will not be a wise thing to do.” But the clever disciple had decided to prove himself and prepared to recite the verse. But before he did so, the other disciples scrambled up to the topmost branches of a big tree nearby. The disciple then recited the magical verse. The tiger slowly began to breathe. “Its working” cried the disciple in excitement and joy. The tiger opened its eyes and saw him jumping and shouting in front of him. Roaring loudly, the tiger pounced on the poor disciple and killed him. The other disciples on the tree watched helplessly as the tiger threw down the dead body of the disciple and went away into the forest. After some time the disciples came down, took the body and went to the sage. The sage looked at them and said, “Now you see what can happen if you don’t use your learning wisely. Let this be a lesson for you.” With that, the sage uttered the magic verse and brought the dead disciple back to life. The sage then taught the verse to all his disciples and sent them into the world to do good. He was sure that after such a lesson, they would be wiser and use their knowledge and learning only for doing good.

1. Why did the other disciples climb the highest branches of the nearby tree?
(a) To save their lives from the tiger
(b) They disliked the clever disciple and were hiding away from him
(c) To enjoy watching the tiger kill the disciple from a safe distance
(d) Because the sage had not taught the other disciples the secret verse
(e) None of these
Ans: (a)

2. Why did the sage send his disciples to the forest?
(a) He wanted to get rid of them.
(b) He had imparted all the knowledge he had and was left with nothing to teach
(c) He wanted them to be killed by a tiger so that he could test his secret verse
(d) So that the disciples could practice his secret verse on the wild animals
(e) None of these
Ans: (e)

3. Which of the following morals can be drawn from the above passage?
(a) A teacher must pass on all his knowledge to others before he dies
(b) Advice of true friends should always be taken
(c) Teachers should always be impartial and should impart knowledge to all uniformly
(d) The knowledge and learning gained should never the misused
(e) None of these
Ans: (d)

4. Why did the sage decide to pass on his secret verse to his disciples?
(a) So that the cleverest of the disciples may teach other disciples as well.
(b) He did not want the verse to die with him
(c) So that the tiger may eat the cleverest disciple
(d) So that he could prove his genius to his disciples
(e) None of these
Ans: (b)

5. What did the sage say to his disciple while teaching his secret verse?
(a) Never to misuse the power achieved with the help of the verse
(b) Not to use it on the wild animals
(c) Not to share it with other disciples
(d) To practice it on animals before humans
(e) None of these
Ans: (a)

6. How did the other disciples react when the clever disciple decided to bring the tiger back to life?
(a) They felt jealous of him
(b) They all felt that it was a wise thing to do
(c) They felt sorry for the tiger
(d) They tried to stop him as he could put their lives in danger
(e) None of these
Ans: (d)

7. Why was the sage proud of his disciples?
(a) Because they had agreed to go to the forest for a long period of 40 days
(b) Because they had fought against the tiger very bravely
(c) Because they could bring the dead tiger back to life
(d) Because they were very bright and eager students
(e) None of these
Ans: (d)

8. Who/what is described as wicked and fierce by the author?
(a) The clever disciple
(b) The sage
(c) The tiger
(d) The forest
(e) None of these
Ans: (c)

9. Which of the following is NOT TRUE in the context of the passage?
(a) The clever disciple was brought back to life by the sage
(b) The sage wanted his disciples to use their learning only for doing good
(c) The sage was biased towards the clever disciple and disliked others
(d) The sage ultimately taught the secret verse to all his disciples
(e) All are true
Ans: (c)

10. Why did the clever disciple recite the verse to the dead tiger?
(a) So that the other disciples may be eaten up by the tiger
(b) To flaunt the power of the verse to the other disciples
(c) Because the sage told him to do so
(d) So that he could himself to the sage
(e) None of these
Ans: (b)

Directions—(Q. 11–13) choose the word that is MOST SIMILAR in MEANING to the word in bold letters.
11. PONDERED
(a) guessed
(b) puzzled
(c) studied
(d) thought
(e) attended
Ans: (d)

12. POUNCED
(a) climbed
(b) looked
(c) roared
(d) plunged
(e) jumped
Ans: (d)

13. CRIED
(a) wept
(b) screamed
(c) protested
(d) tearful
(e) saddened
Ans: (a)

D
irections—(Q. 14 –15) choose the word which is MOST OPPOSITE in MEANING to the wordin bold letters.
14. BRIGHT
(a) dim
(b) soft
(c) dull
(d) faint
(e) vague
Ans: (c)

15. FIERCE
(a) timid
(b) emotional
(c) civilized
(d) pleased
(e) domesticated
Ans: (a)

Directions—(Q. 16 –20) Which of the phrases (a), (b), (c) and (d) given below each sentences should replace the phrase printed in bold in the sentence to make it grammatically correct ?
If the sentence is correct as it is given and No Correction is required, mark (e) as the answer.

16. He wants a start a new business but he did not have any money.
(a) Thought to start (b) Want to started (c) Wanted to start (d) Wants for start (e) No Correction Required
Ans: (c)

17. As Rohan was already late, he had his breakfast while walk down the road.
(a) walking down the (b) walking at the (c) walked on the (d) walked down the (e) No Correction Required
Ans: (a)

18. The poor bullock do not move since the cart was overloaded with heavy goods.
(a) cannot move (b) unable to move (c) was not moved (d) could not move (e) No Correction Required
Ans: (d)

19. He covered the expensive furniture at sheet before he started painting the ceiling.
(a) with sheet ahead (b) with sheet before (c) in sheet prior (d) in sheet earlier (e) No Correction Required
Ans: (b)

20. The smoke if inhaled proves to be more fatal than the burn itself.
(a) be most fatal (b) kill more fatal (c) be additional fatal (d) be greater fatal (e) No Correction Required
Ans: (e)




 

Friday, 3 July 2015

General Awareness Questions for Bank Exams - 11

General Awareness Questions for Bank Exams – 11

1.       Who has been appointed the new Controller General of Accounts on July 1, 2012?
(a)    Jawahar Thakur       
(b)   Neeraj Kumar           
(c)    A.K. Aggarwal           
(d)   Arun Mishra
Ans: (a)

2.       Who is the author of the book ‘Beyond the lines’: An Auto Biography?
(a)    Sharad Pawar           
(b)   Kushwant Singh       
(c)    Kuldip Nayar                             
(d)   General.  J.J. Singh
Ans: (c)

3.       NGRBA that was in news stands for:
(a)    National Godavari River Basin Authority
(b)   National Ganga River Basin Authority
(c)    National Gai River Basin Authority
(d)   None of these
Ans: (b)

4.       Who is the author of the book ‘ Turning Point – A journey through challenges’?
(a)    A. P. J. Abdul Kalam
(b)   Hamid Ansari
(c)    Jaswant Singh
(d)   Atal Bihari Vajpayee
Ans: (a)

5.       Who has been awarded the World Food Prize in 2012?
(a)    Kofi Annan
(b)   Daniel Hillel
(c)    Ban Ki-Moon
(d)   Hillary Clinton
Ans: (b)

6.       P.N. Dhar passed away on July 12, 2012 in New Delhi. He was a great –
(a)    Poet
(b)   Scientist
(c)    Musician
(d)   Economist
Ans: (d)

7.       Which part of India was included in World Heritage List by UNESCO on July 1, 2012?
(a)    Eastern Ghats
(b)   Western Ghats
(c)    Kaziranga National Park
(d)   Konkan Railway
Ans: (b)

8.       India’s first Mega Food Park became functional  in 2012 at:
(a)    Jaipur
(b)   Kanpur
(c)    Chittoor
(d)   Pune
Ans: (c)

9.       Geeta Chaudhary is associated with:
(a)    Boxing
(b)   Wrestling
(c)    Judo
(d)   Badminton
Ans: (c)

10.   Who won the first medal for India in London Olympics in 2012?
(a)    Abhinav Bindra
(b)   Vijender Singh
(c)    Gagan Narang
(d)   Sushil Kumar
Ans: (c)

11.   Who is current Home Minister of India?
(a)    P. Chidambaram
(b)   Sushil Kumar Shinde
(c)    Rajnath Singh
(d)   Sharad Pawar
Ans: (c)

12.   Which country first granted asylum to wikileaks founder Julien Assange?
(a)    USA
(b)   UK
(c)    Ecuador
(d)   Germany
Ans: (c)

13.   Captain Lakshmi Sehgal who passed away some time ago is:
(a)    First Indian Airlines Pilot
(b)   First MIG-21 fighter plane pilot
(c)    Veteran freedom fighter
(d)   Chief Minister of U.P.
Ans: (c)

14.   One of the Asia-Pacific nations had agreed to hold its first ever maritime exercise with India. The nation is –
(a)    Australia
(b)   USA
(c)    Japan
(d)   Vietnam
Ans: (b)

15.   Francois Hollande was elected as President of which of the following nation?
(a)    Poland
(b)   Portugal
(c)    France
(d)   Greece
Ans: (c)  



Tuesday, 30 June 2015

Computer Knowledge - 3 (for Bank Exams)

 Computer Knowledge – 3

Directions for questions 1-11: Expand the following terms:

1.       ODBC
Ans:  Open Database Connectivity.

2.       HTML
Ans:  Hyper Text Mark-up Language

3.       RISC
Ans:  Reduced Instruction Set Computing

4.       ASCII
Ans:  American Standard Code for Information Interchange

5.       ANSI
Ans:  American National Standard Institute.

6.        XML
Ans:  Extended Mark-up Language

7.        FLOPS
Ans:  Floating Point Operating Per Second

8.       SQL
Ans:  Sequential Query Language

9.       QBE
Ans:  Query By Example

10.   ALE
Ans:  Address Latch Enable

11.   What is lagging in DBMS ?
Ans:  Reduced Redundancy.

Directions 12 to 20: For the following questions find the odd man out

12.   Unix
OS/2
CMOS
MSDOS
Ans:  CMOS

13.   Oracle
Informix
Sybase
LISP
Ans: LISP

14.   Laser
Inkjet
Dot-matrix
Mouse
Ans: Mouse

15.   Dir
Cls
Csh
Copy
Ans: Csh

16.   Bit
Byte
Nibble
Digit
Ans: Digit

17.   Hard Disk
Floppy Drive
CD ROM
Cache
Ans: Cache

18.   SQL
QUEL
QBE
ORACLE
Ans: Oracle

19.   C++
JAVA
VC++
PASCAL
Ans: PASCAL

20.   Projection Operation
Selection Operation
Intersection
Set Difference Operation
Ans: Intersection

21.   Which of the following is a universal gate?
(a) OR
(b) AND
(c) XOR
(d) NOR
 Ans: (d)

22.   The default back end of the VB is:
(a) Oracle
(b) Sybase
(c) Informics
Ans: Sybase

23.   What is meant by Superconductivity?
Ans: No resistance

24.   Viscosity
Ans: Friction

25.   What is the Lock Based Protocol used for?
Ans: Concurrency Control in DBMS


English Verbal - 14 (for Bank Exams)

English – Verbal – 14 (for Bank Exams)

Find the meaning of the following Idioms:

1.       A man of letters
A man, usually a writer, who knows a lot about literature A distinguished statesman and man of letters, he was born just before the turn of the century.

2.       A man of straw
A person or an idea that is weak and easy to defeat. Compared to their illustrious predecessors, the country's leaders seem to be men of straw.

       3.     To be in the air
(i) Is a feeling, especially excitement, is in the air, everyone is feeling it at the same time.
 There was excitement in the air as people gathered in the main square to hear the
Proclamation.
(ii) to be going to happen very soon The daffodils are in flower and spring is definitely in the
 air. I get the feeling that change is in the air.

4.       To bite the dust
(i)             to die. A shot rang out, and another cowboy bit the dust. The soldier was too young to bite the dust.
(ii)             to break; to fail; to give out. My old car finally bit the dust. This pen is out of ink and
 has bitten the dust.

5.       Man of few words
Someone, not necessarily a man, who speaks concisely or not at all, He is a man of few
 words, but he usually makes a lot of sense.

6.       Penny wise pound foolish
Someone who is penny wise, pound foolish can be very careful or mean with small amounts of money, yet wasteful and extravagant with large sums.

Questions: (7 – 11) Please arrange the following phrases in order to make a proper sentence.

7.       A. They are the three faces of dysphoria - bad feeling.
B. Anxiety, Depression and Anger.
C. When the three combine and get out of control, we get what is called mental illness.
D. All of us experience three emotions almost daily.
(a) ACDB
(b) CBDA
(c) CADB
(d) DBAC
Ans: (d)

8.       A. This is the key to tap the creative power inside us.
B. It is difficult to control our thinking and feelings.
C. That is, unless we work at it consciously and persistently.
D. We are influenced and limited by attitudes, prejudices by other individuals and by
external conditions to such an extent that few can control mental and emotional processes.
(a) ACDB
(b) BDCA
(c) CADB
(d) DBAC
Ans: (b)

9.       A. Two vital facts must be understood.
B. The subconscious mind has the power to create.
C. The second is that it obeys the orders given to it by the conscious mind.
D. Its function is to bring to full expression whatever is desired by the conscious mind.
(a)ABCD
(b) CBDA
(c) ADBC
(d) DBAC
Ans: (a)

10.   A. But what is not often understood is that this flash is outcome of long periods of
incubation.
B. The layman thinks that it is a spell of divine flash which illuminates the dark and the
hidden.
C. True, it does.
D. Inspiration is much misunderstood term.
(a) DBAC
(b) ACBD
(c) DBCA
(d) CADB
Ans: (c)

11.   A. As a result, the world has undergone a transformation.
B. Science and civilization have made rapid strides especially in recent times.
C. This constitutes the basic factor in the use of productive resources.
D. But behind all the progress of mankind is the human factor which is invaluable and
irreplaceable.
(a) ABDC
(b) BADC
(c) DCAB
(d) CBDA
Ans: (b)

Questions: (12 – 21) Identify the word with the correct spelling.

12.   (i) supercede                     (ii) supersede
Ans: (ii)

13.   (i)  recommend                 (ii) recoomend
Ans: (i)

14.   (i) superintendent           (ii) superitendant
Ans: (i)

15.   (i) separete                        (ii) separate
Ans: (ii)

16.   (i) succeed                          (ii) suceed
Ans: (i)

17.   (i) coolly                               (ii) cooly
Ans: (i)

18.   (i) despair                            (ii) dispair
Ans: (i)

19.   (i) rediculous                      (ii) ridiculous
Ans: (ii)

20.   (i)indispensable                (ii) indespensable
Ans: (i)

21.   (i) tranquility                      (ii) tranquillity
Ans: (ii)




Saturday, 27 June 2015

Aptitude Questions - 4 (for Bank Exams)

Aptitude Questions – 4 (For Bank Exams)

1.                   Find the reminder when 333666777888999 divided by 3 or 9 or 11?
Ans: Reminder 5 when divided by 11.  
Rule of divisibility for 3 and 9 – I f the sum of the digits divisible by 3 or 9 then the whole number is divisible by 3 and 9.
Rule of divisibility for 11 --- If the difference between the sum of the odd placed numbers and even placed numbers is either zero or divisible by 11 then the whole number is divisible by 11.
In this case the difference is 5 and that’s the reminder.

2.                   Which is the biggest perfect square amongst the following
(a) 15129,    (b) 12348,            (c) 23716,             (d) 20736
Ans: (c)

3.                   The greatest area of the following:
(a) The radius of circle is 4
(b) The square of diagonal is 4
(c) The square of side is 4
Ans: (a)

4.                   The area of the maximum size of the circle inscribed within a 10 inch square?
Ans: 78.57 sq. inch  ( The radius of the circle will be half the side of the square)

5.                    A gold density is 19 times greater than the water and for copper it is 9 times. At
what ratio you can mix gold and copper to get 15 times denser than water?
                       Ans: 3 : 2
                       Using the rule of alligation we have for Gold 15 – 9 = 6 parts and for Copper
                       19 – 15 = 4 parts. Thus the ratio is 3 : 2

6.                   Find the value of (1.99)2
Ans: 3.9601

7.                   There is a room with 6' x 8'. A one foot tile is fixed along the 4 walls in one row. How
many more one foot tiles are required  to finish the work.
Ans. 24 Tiles
Since all along the wall one foot tile is already fixed, the dimension of the room now is reduced to  -> 4 * 6 = 24 sq.ft.

8.                   Two persons can finish a job in 8 days. First person alone can finish the work in 24
days. How many days does the second person take to finish the job?
Ans: 12 days
Let the two persons be A and B.
A in one day does 1/24 job and B in one day 1/B job.
They both together finish the job in 8 days.
Hence the job done together in one day is 1/8. Thus we have an equation
1/24 + 1/B = 1/8 -> 1/B = 1/8 – 1/24 = 1/12.
1/B = 1/12. B will alone finish the job in 12 days.

9.                   A person's salary is getting reduced by 20%. What percentage should be added to
get back his original salary?
Ans: 25%
Use the formula ----  100R/100-R (where R is the percentage of reduction)

10.               Two persons start from the same point and walk in opposite directions with 5km/hr and
       5.5km/hr speed respectively. What is the distance separating them after 2 and half hrs?
       Ans: 26.25 km
       Relative speed between the two is ---- 5 + 5.50 = 10.50 km/hr. (They walk in opp.
                     direction.
      Thus the distance between them after 2.30 hours will be 10.50 * 2.30hrs = 26.25 km.    

11.               A person starts walking at a speed of 5km/hr through half the distance, rest of the distance he covers with a speed 4km/hr. Total time of travel is 9 hours. What is the maximum distance he can cover?
Ans: 40.50 km.
Average speed is ---(5 + 4)/2 = 4.50 km. ( Note: He covers the total distance in two equal half)
Distance/ Speed is = Time.  Let X be the distance.
Thus ------  x/4.5 = 9 hrs. solving we get … X = 40.50km

12.               Initially two cups of same volume are present with milk filled upto 3/5th and 4/5th
of their volumes. Water is then filled. Then two mixtures are mixed. Find the ratio of water to milk in the mixture.
Ans: 3 : 7
A simple question. Let the volume of the two cups be 5 each. Then total volume is 10. The total volume of Milk in these two cups initially is 3 + 4 = 7parts. The remaining is 3 parts now filled with water.
Thus the ratio of water and milk is ------- 3 : 7.

13.               16 grams of radioactive material decays into 8 grams in 10 years. How long will it
take to decay to 1 gram?
Ans: 70 years.
16 gm reduced to 8gm in 10yrs. So 8 gm get decayed.
For decaying 1 gm it takes 10/8 years. For decaying 8 gm it takes 10/8*8
Remaining 8 gm need to decay 7 to get 1 gm remaining.
For decaying 7 gm it will take
10/8*8*7 = 10*7
= 70 years
 
14.               In a rectangle the length is increased by of the original length. By what proportion
should the width be reduced so that the area will be the same?
Ans: 50%
Assume the original Length and Breadth as 5 and 4. The area is 5 * 4 = 20.
The new length is 5 + 5 = 10. To retain the same area the breadth should be 2.
Breadth reduced from 4 to 2 or 50%.

15.               A person’s salary is decreased by steps of 20%, 15% and 10%. What will be the percentage decrease, if the salary is decreased in a single shot?
Ans: 38.8%
Successive percentage change is given by the formula ->  x + y + xy/100 where x and y are the two successive percentages.
Applying this after the second decrease, the percentage change is ->  -20 - 15 + 300/10 =  -32%
After the third decrease the change will be:
-32 – 10 + 320/100 = - 38.8%