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Placement Materials & Answers-Free Download


Software Companies Placement Papers-Essar-Free Download

1.The fourth proportional to 5, 8, 15 is:

A. 18 B. 24 C. 19 D. 20

Ans. B

Solution:

Let the fourth proportional to 5, 8, 15 be x. Then, 5 : 8 : 15 : x 5x = (8 x 15) x=(8*15)/5=24

2. If 40% of a number is equal to two-third of another number, what is the ratio of first number to the second number?

A. 2 : 5 B. 3 : 7 C. 5 : 3 D. 7 : 3

Ans. C

Solution: Let 40% of A=2/3 B Then,40 A/100=2B/3 => 2A/5=2B/3 => A/B-[2/3 – 5/2]=5/3p A : B = 5 : 3.

3. The salaries A, B, C are in the ratio 2 : 3 : 5. If the increments of 15%, 10% and 20% are allowed respectively in their salaries, then what will be new ratio of their salaries?

A. 3 : 3 : 10 B. 10 : 11 : 20 C. 23:33:60 D. 32 :43:53

Ans. C

Solution:

Let A = 2k, B = 3k and C = 5k. A’s new salary = 115/ 100 of 2k =[115/ 100 x 2k]= 23k/ 10 B’s new salary = 110/ 100 of 3k = [110/ 100x 3k] = 33k/ 10 C’s new salary = 120/ 100 of 5k = [120/ 100 x 5k] = 6k New ratio = 23k : 33k : 6k = 23 : 33 : 60

4. A bag contains 6 black and 8 white balls. One ball is drawn at random. What is the probability that the ball drawn is white?

A. 3/4 B. 4/7 C. 1/8 D. 3/7

Ans. B

Solution:

Let number of balls = (6 + 8) = 14. Number of white balls = 8. P (drawing a white ball)=8/14=4/7

5. One card is drawn at random from a pack of 52 cards. What is the probability that the card drawn is a face card?

A. 1/13 B. 3/13 C. 1/4 D. 9/5

Ans. B

Solution:

Clearly, there are 52 cards, out of which there are 12 face cards. P (getting a face card)=12/52=3/13

6. Two cards are drawn together from a pack of 52 cards. The probability that one is a spade and one is a heart, is:

A. 3 /20 B. 29/ 34 C. 47/ 100 D. 13 /102

Ans. D

Solution:

Let S be the sample space. Then, n(S) = 52C2 = 52 * 51/ (2*1)= 1326. Let E = event of getting 1 spade and 1 heart. n(E) = number of ways of choosing 1 spade out of 13 and 1 heart out of 13 = (13C1 x 13C1) = (13 x 13) = 169. P(E) =n (E)/n(S) = 169/ 1326= 13/102

7. A bag contains 4 white, 5 red and 6 blue balls. Three balls are drawn at random from the bag. The probability that all of them are red, is:

A. 1/ 22 B. 3/ 22 C. 2/ 91 D. 2/ 81

Ans. C

Solution:

Let S be the sample space. Then, n(S)= number of ways of drawing 3 balls out of 15 = 15C3 = (15 x 14 x 13)/ (3 x 2 x 1) = 455. Let E = event of getting all the 3 red balls. n(E) = 5C3 = 5C2 = (5 x 4)/ (2 x 1)= 10. P(E) = n(E) / n(S)= 10/ 455 = 2/ 91

8. A card is drawn from a pack of 52 cards. The probability of getting a queen of club or a king of heart is:

A. 1 /13 B. 2 /13 C. 1 /26 D. 1 /52

Ans. C

Solution:

Here, n(S) = 52. Let E = event of getting a queen of club or a king of heart. Then, n(E) = 2. P(E) =n(E)/ n(S)= 2/ 52= 1/ 26

9. Two number are in the ratio 3 : 5. If 9 is subtracted from each, the new numbers are in the ratio 12 : 23. The smaller number is:

A. 27 B. 33 C. 49 D. 55

Ans. B

Solution:

Let the numbers be 3x and 5x. Then ,(3x-9)/(5x-9)=12/13 23(3x – 9) = 12(5x – 9) 9x = 99 x = 11. The smaller number = (3 x 11) = 33.

10. In a bag, there are coins of 25 p, 10 p and 5 p in the ratio of 1 : 2 : 3. If there is Rs. 30 in all, how many 5 p coins are there?

A. 50 B. 100 C. 150 D. 200

Ans. C

Solution:

Let the number of 25 p, 10 p and 5 p coins be x, 2x, 3x respectively. Then, sum of their values=Rs[(25x/100)+(10*2x)/100+(5*3x)/100]=Rs 60x/100 60x/100=30 =>x=(30*100)/60=50 Hence, the number of 5 p coins = (3 x 50) = 150.

11. B2CD, _____, BCD4, B5CD, BC6D

A. B2C2D B. BC3D C. B2C3D D. BCD7

Ans. B

Solution:

Because the letters are the same, concentrate on the number series, which is a simple 2, 3, 4, 5, 6 series, and follows each letter in order.

12. DEF, DEF2, DE2F2, _____, D2E2F3

A. DEF3 B. D3EF3 C. D2E3F D. D2E2F2

Ans. D

Solution:

In this series, the letters remain the same: DEF. The subscript numbers follow this series: 111, 112, 122, 222, 223, 233, 333, …

13. 10 women can complete a work in 7 days and 10 children take 14 days to complete the work. How many days will 5 women and 10 children take to complete the work?

A. 3 B. 5 C. 7

D. Cannot be determined

Ans. C

Solution:

1 woman’s 1 day’s work=1/70 1 child’s 1 day’s work =1/140 (5 women + 10 children)’s day’s work =5/70 +10/140=1/14 +1/14=1/7 5 women and 10 children will complete the work in 7 days.

14. A alone can do a piece of work in 6 days and B alone in 8 days. A and B undertook to do it for Rs. 3200. With the help of C, they completed the work in 3 days. How much is to be paid to C?

A. Rs. 375 B. Rs. 400 C. Rs. 600 D. Rs. 800

Ans. B

Solution:

C’s 1 day’s work = 1/3 – [1/6 + 1/8]= 1/3 – 7/24= 1/24 A’s wages : B’s wages : C’s wages = 1/6: 1/8: 1/24= 4 : 3 : 1. C’s share (for 3 days) = Rs.[3 x 1/24 x 3200] = Rs. 400.

15. The product of two numbers is 9375 and the quotient, when the larger one is divided by the smaller, is 15. The sum of the numbers is:

A. 380 B. 395 C. 400 D. 425

Ans. C

Solution:

Let the numbers be x and y. Then, xy = 9375 and x/y=15 Xy/(x/y)=9375/15 y2 = 625. y = 25. x = 15y = (15 x 25) = 375. Sum of the numbers = x + y = 375 + 25 = 400.

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