Question

In a binomial distribution, if n = 20 and q = 0.75, then write its mean.

 

Answer 1

n= 20 , q =0.75

\[\Rightarrow p = 1 - q = 0 . 25\]
\[\text{ Mean = np } = 20(0 . 25) = 5\]
\[\text{ Thus, mean } = 5\]