Question

A die tossed 5 times. getting an odd number is considered a success. Then the variance of distribution of success is

• A. $\frac{8}{3}$
• B. $\frac{3}{8}$
• C. $\frac{4}{5}$
• D. $\frac{5}{4}$

Answer 1

The correct option is D $\frac{5}{4}$

Variance$=npq$

here$,$ $n=5$

$p=\frac{1}{2}$

$q=\frac{1}{2}$

Thus$,$ variance$=5\times \frac{1}{2}\times \frac{1}{2}=\frac{5}{4}$

Hence,

option $\left(D\right)$ is correct answer.