(IGP) IAS Pre Paper - 2: GS - Basic Numeracy - Probability (MCQ -21)

1. Which of the following cannot be the probability of an event ?
(a) 1/4
(b) 20%
(c) 1.2
(d) 0.3

2. If P(E) = 0.03, what is the probability of ‘not E’?
(a) 0.90
(b) 0.97
(c) 0.07
(d) 0.70

3. A bag contains orange flavoured candies only. A girl takes out one candy without looking into the bag. What is the probability that she takes out an orange flavoured candy ?
(a) 1
(b) 0
(c) 1/2
(d) 1/4

4. A bag contains orange flavoured candies only. A girl takes out one candy at random from the bag. What is the probability that she takes out a strawberry flavoured candy ?
(a)1/3
(b) 1
(c) 0
(d) 1/2

5. An unbiased die is thrown once. What is the probability of getting a prime number ?
(a) 1/2
(b) 1/4
(c) 2/3
(d) 1/3

6. In a single throw of a die, find the probability of getting a composite number.
(a) 1/5
(b) 1/2
(c) 1/3
(d) 1/4

7. In a simultaneous throw of a pair of dice, find the probability of getting equal numbers.
(a) 3/4
(b) 1/4
(c) 1/6
(d) 5/6

8. In a simultaneous throw of a pair of dice, find the probability of getting a sum, which is a perfect square ?
(a) 13/ 36
(b) 7 / 36
(c) 11 / 36
(d) 5/ 36

9. In a simultaneous throw of a pair of dice, find the probability of getting prime numbers on both the faces.
(a)11/3
(b) 11/36
(c) 1/4
(d) 11/ 15

10. Two dice are thrown simultaneously. What is the probability of getting a number other than 4 on any dice ?
(a) 26/ 36
(b) 1/3
(c) 17/ 36
(d) 2/3

11. In a single throw with two dice, find the probability of throwing an even number on one and a multiple of 3 on the other.
(a) 1/6
(b) 5/36
(c) 11/36
(d) 5/6

12. The probability that it will rain tomorrow is 0.75. What is the probability that it will not rain tomorrow ?
(a) 0.25
(b) 0.025
(c) 2.5
(d) 2.05

13. A and B throw a pair of dice. If A throws 8, find B’s chance of throwing a higher number.
(a) 7 / 18
(b) 5/18
(c) 11 / 18
(d) 13 / 18

14. Two dice are thrown at a time. Find the probability that the difference of numbers shown on the dice is 2.
(a) 13/ 36
(b) 19/ 36
(c) 11/ 36
(d) 7/ 36

15. A coin is tossed twice. Find the probability of getting at least one tail.
(a) 3/4
(b) 1/4
(c) 1/3
(d) 2/3

16. A coin is tossed twice. Find the probability of getting no head.
(a) 1/8
(b) 1/4
(c) 3/4
(d) 5/8

17. Three unbiased coins are tossed. Find the probability of getting at least two heads.
(a) 2/3
(b) 2/5
(c) 1/4
(d) 1/2

18. Find the probability that a vowel selected at random from the 5 vowels is an’ i ‘.
(a) 4/5
(b) 1/3
(c) 1/5
(d) 1/2

19. Find the probability that a letter selected from the English alphabet is not a vowel.
(a) 21/26
(b) 5/26
(c) 11/26
(d) 19/26

20. Three numbers are chosen from 1 to 8. Find the probability for the 3 chosen numbers to be consecutive.
(a) 11/28
(b) 3/28
(c) 5/28
(d) 9/28

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