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Chapter 14 · Question 2

Find the probability of getting a head when a fair coin is tossed once.

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Q2

Find the probability of getting a head when a fair coin is tossed once.

Answer Revealed

Direct Answer:

A fair coin has two equally likely outcomes: H and T. Favourable outcome for head is 1. So

P(H)=\frac12

.

Simple Explanation

There are two possible outcomes and one is head, so probability is

1/2

.

Exam-Ready Structure

Sample space

S=\{H,T\}

. Event

E=\{H\}

. Thus

n(S)=2

and

n(E)=1

. Therefore

P(E)=\frac{1}{2}

.

Key Points

A fair coin has two equally likely outcomes: H and T.
Use the NCERT formula or theorem carefully.
Write units and final conclusion where applicable.

Related Questions

A fair die is thrown once. Find the probability of getting an even number.

What are the minimum and maximum possible values of probability?

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