Question

Sum of the probabilities of getting a head and a tail when an unbiased coin is tossed is 

A) 1/2

B) 1/4

C) 1 

D) 0

Answer 1

Correct option is (C) 1

When an unbiased coin is tossed then possible outcomes are S = {H, T}.

\(\therefore\) P(H) = \(\frac12\) & P(T) \(=\frac12\)

\(\therefore\) P(H) + P(T) \(=\frac12+\frac12=1\)

Hence, sum of probabilities of getting a head and a tail when an unbiased coin is tossed is 1.

Answer 2

Correct option is   C) 1