Probability · Class 11 · CBSE · Science Mathematics

A fair die is thrown once. What is the probability of obtaining a number that is not prime?

Practice question from Probability (Class 11 · CBSE · Science Mathematics), with the correct answer and a step-by-step solution.

easy · MCQ · Q-7D12F9

A fair die is thrown once. What is the probability of obtaining a number that is not prime?

  1. A.1/3
  2. B.1/2Correct answer
  3. C.2/3
  4. D.5/6

Solution

The prime numbers on a die are 2,3,2, 3, and 55. The non-prime outcomes are 1,4,1, 4, and 66, so there are 3 favourable outcomes out of 6. Thus, P(not prime)=36=12P(\text{not prime})=\frac{3}{6}=\frac{1}{2}.

More from Probability

All of Probability

Practise more Mathematics

Sign up free for adaptive practice on this chapter, with instant feedback and hints on every question.

Start practising free

Free to start · No credit card needed