Probability Questions and Answers for Bank Exams and SSC

Important Probability Questions and Answers:

Q.9. A box contains 10 black and 10 white balls. The probability of drawing two balls of the same colour, is:

(A) 9/19

(B)8/37

(C) 11/19

(D)  5/19

(E) None of these

Q.10. In a class, there are 15 boys and 10 girls. Three students are selected at random. The probability that 1 girl and 2 boys are selected, is:

(A) 21/46

(B) 25/117

(C) 1/50

(D) 3/25

(E) None of these

Q.11. A box contains 20 electric bulbs, out of which 4 are defective. Two bulbs are chosen at random from this box. The probability that at least one of these is defective, is

(A) 4/21

(B) 7/19

(C) 12/21

(D) 31/97

(E) None of these

Q.12. Two dice are tossed. The probability that the score is prime number is:

(A) 1/7

(B) 5/12

(C) 1/4

(D) 1/2

(E) None of these

Q.13. A man and his wife appear in an interview for two vacancies in the same post. The probability of husband’s selection is (1/7) and the probability of wife’s selection is (1/5). What is the probability that only one of them is selected?

(A) 5/4

(B) 2/7

(C) 8/17

(D) 4/9

(E) None of these

Q.14. In a lottery, there are 10 prizes and 25 blanks. A lottery is drawn at random. what is the probability of getting a prize ?

(A) 2/9

(B) 3/6

(C) 2/7

(D) 5/7

(E) None of these

Q.15. 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) 1/11

(B) 2/13

(C) 1/26

(D) 1/52

(E) None of these

Q.16. From a pack of 52 cards, one card is drawn at random. What is the probability that the card drawn is a ten or a spade?

(A) 4/13

(B) 13/4

(C) 1/13

(D) 1/26

(E) None of these

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