MCQ Probability
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
21 ) Three houses are available in a locality. Three persons
apply for the houses. Each
applies for one house without consulting others. The
probability that all the three apply
for the same house is
( a ) 2/9
( b ) 1/9
( c ) 8/9
( d ) 7/9
22)A bag contains 4 red and 3 black balls. A second bag
contains 2 red and 4 black
balls. One bag is selected at random. If from the selected
bag one ball is drawn, then
the probability that the ball drawn is red is
( a ) 1/42
( b ) 3/41
( c ) 9/42
( d ) 19/42
23)A box contains 6 nails and 10 nuts. Half of the nails and
half of the nuts are rusted.
If one item is chosen at random, then the probability that
it is rusted or a nail is
( a ) 3/16
( b ) 5/16
( c ) 11/16
( d ) 14/16
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