Probability · Class 11 · CBSE · Science Mathematics

A fair coin is tossed three times. What is the probability of obtaining exactly two heads?

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

easy · MCQ · Q-24703F

A fair coin is tossed three times. What is the probability of obtaining exactly two heads?

  1. A.1/8
  2. B.3/8Correct answer
  3. C.1/2
  4. D.5/8

Solution

There are 23=82^3=8 equally likely outcomes. Exactly two heads can occur in (32)=3{3\choose 2}=3 ways, so the probability is 3/83/8.

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