Question

The mean number of heads in three tosses of a coin is

• A. $\frac{3}{2}$
• B. $\frac{5}{2}$
• C. $\frac{1}{2}$
• D. $\frac{1}{8}$

Answer 1

The correct option is A $\frac{3}{2}$

We know that mean of binomial distibution is np here
$n=3,P=\frac{1}{2},.$ So, mean $=3\times \frac{1}{2}=\frac{3}{2}.$