Most important Basic Probability MCQs with Answers for mathematics test preparation online.

## Basic Probability MCQs

**The probability that a number selected at random from the first 50 natural numbers is a composite number is _____?**

A. 21/25**B. 17/25**

C. 4/25

D. 8/25

**A coin is tossed live times. What is the probability that there is at the least one tail?**

**A. 31/32**

B. 1/16

C. 1/2

D. 1/32

**If a number is chosen at random from the set {1, 2, 3, …., 100}, then the probability that the chosen number is a perfect cube is _____?**

**A. 1/25**

B. 1/2

C. 4/13

D. 1/10

**Out of first 20 natural numbers, one number is selected at random. The probability that it is either an even number or a prime number is ______?**

A. 1/2

B. 16/19

C. 4/5**D. 17/20**

**If two dice are thrown together, the probability of getting an even number on one die and an odd number on the other is ____?**

A. 1/4**B. 1/2**

C. 3/4

D. 3/5

**If four coins are tossed, the probability of getting two heads and two tails is _____?**

**A. 3/8**

B. 6/11

C. 2/5

D. 4/5

**If a card is drawn from a well shuffled pack of cards, the probability of drawing a spade or a king is _____?**

A. 19/52

B. 17/52

C. 5/13**D. 4/13**

**If six persons sit in a row, then the probability that three particular persons are always together is ______?**

A. 1/20

B. 3/10**C. 1/5**

D. 4/5

**A bag contains 7 green and 8 white balls. If two balls are drawn simultaneously, the probability that both are of the same colour is -.**

A. 8/15

B. 2/5

C. 3/5**D. 7/15**

**A basket has 5 apples and 4 oranges. Three fruits are picked at random. The probability that at least 2 apples are picked is _____?**

**A. 25/42**

B. 9/20

C. 10/23

D. 41/42

**Three 6 faced dice are thrown together. The probability that all the three show the same number on them is -.**

A. 1/216**B. 1/36**

C. 5/9

D. 5/12

**Three 6 faced dice are thrown together. The probability that no two dice show the same number on them is _____?**

A. 7/12**B. 5/9**

C. 1/36

D. 5/12

**Three 6 faced dice are thrown together. The probability that exactly two dice show the same number on them is -.**

A. 5/9**B. 5/12**

C. 1/36

D. 7/12

**A box contains nine bulbs out of which 4 are defective. If four bulbs are chosen at random, find the probability that all the four bulbs are defective.**

A. 62/63

B. 125/126

C. 1/63**D. 1/126**

**A box contains nine bulbs out of which 4 are defective. If four bulbs are chosen at random, find the probability that at least one bulb is good.**

A. 6/63

B. 2/63**C. 125/126**

D. 1/126

**A box contains 3 blue marbles, 4 red, 6 green marbles and 2 yellow marbles. If four marbles are picked at random, what is the probability that none is blue?**

A. 17/91**B. 33/91**

C. 51/91

D. 65/91

**A box contains 3 blue marbles, 4 red, 6 green marbles and 2 yellow marbles. If three marbles are picked at random, what is the probability that they are all blue?**

**A. 1/455**

B. 2/455

C. 1/91

D. 4/455

**A box contains 3 blue marbles, 4 red, 6 green marbles and 2 yellow marbles. If two marbles are picked at random, what is the probability that they are either blue or yellow?**

A. 3/22

B. 4/21**C. 2/21**

D. 1/14

**A bag contains five white and four red balls. Two balls are picked at random from the bag. What is the probability that they both are different color?**

A. 4/9**B. 5/9**

C. 7/9

D. 8/9

**Out of 15 consecutive numbers, 2 are chosen at random. The probability that they are both odds or both primes is ____?**

A. 10/17

B. 10/19

C. 46/105**D. Cannot be determined**

**What is the probability that a leap year has 53 Sundays and 52 Mondays?**

A. 0**B. 1/7**

C. 2/7

D. 5/7