1) There are 2 pots. One pot has 5 red and 3 green marbles. Other has 4 red and 2 green marbles. What is the probability of drawing a red marble?  Published on 15 Mar 17
a. 9/14
b. 31/48
c. 1
d. 1/2

2) A pot has 2 white, 6 black, 4 grey and 8 green balls. If one ball is picked randomly from the pot, what is the probability of it being black or green?  Published on 10 Mar 17
a. 3/4
b. 7/10
c. 4/3
d. 1/10

3) A box has 6 black, 4 red, 2 white and 3 blue shirts. When 2 shirts are picked randomly, what is the probability that either both are white or both are blue?  Published on 10 Mar 17
a. 4/105
b. 1/35
c. 1/105
d. 1/15

4) What will be the possibility of drawing a jack or a spade from a well shuffled standard deck of 52 playing cards?  Published on 10 Mar 17
a. 4/13
b. 1/26
c. 1/13
d. 17/52

5) Suresh keeps all his socks in a single drawer. He has 24 pairs of white socks and 18 pairs of grey socks. Suresh picks 3 socks randomly. Find the possibility of Suresh choosing a matching pair.  Published on 05 Mar 17
a. 1/36
b. 1/108
c. 7/36
d. 1

6) Three unbiased coins are tossed. What is the probability of getting at least 2 tails?  Published on 06 Jul 15
a. 0.75
b. 0.5
c. 0.25
d. 0.2
Answer
Explanation

ANSWER: 0.5
Explanation: S = {HHH, HHT, HTH, HTT, THH, THT, TTH, TTT} E = {HTT, THT, TTH, TTT} n(S) = 8 n(E) = 4 P(E) =n(E) / n(S) = 4/8 = 0.5


7) Two friends A and B apply for a job in the same company. The chances of A getting selected is 2/5 and that of B is 4/7. What is the probability that both of them get selected?  Published on 06 Jul 15
a. 8/35
b. 34/35
c. 27/35
d. None of these
Answer
Explanation

ANSWER: 8/35
Explanation: P(A) = 2/5 P(B) = 4/7 E = {A and B both get selected} P(E) = P(A)*P(B) = 2/5 * 4/7 = 8/35


8) Tickets numbered 1 to 50 are mixed and one ticket is drawn at random. Find the probability that the ticket drawn has a number which is a multiple of 4 or 7?  Published on 06 Jul 15
a. 9/25
b. 9/50
c. 18/25
d. None of these
Answer
Explanation

ANSWER: 9/25
Explanation: S = {1, 2, 3, … , 49, 50} E = {4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 7, 14, 21, 35, 42, 49} n(S) = 50 n(E) = 18 P(E) = n(E)/n(S) = 18/50 = 9/25


9) Two dice are tossed simultaneously. Find the probability that the total is a prime number.  Published on 15 Jun 15
a. 7/9
b. 5/12
c. 1/6
d. 5/9
Answer
Explanation

ANSWER: 5/9
Explanation: No explanation is available for this question!


10) A class consists of 15 girls and 10 boys. Three students are to be randomly selected. Find the probability that one boy and two girls are picked.  Published on 15 Jun 15
a. 1/50
b. 3/25
c. 21/46
d. 25/122
Answer
Explanation

ANSWER: 21/46
Explanation: No explanation is available for this question!

