Question

If a random variable $X$ follows Bernoulli Distribution with mean $2.4$ and variance $1.44$, the number of independent trials $n$ is

• A. $10$
• B. $8$
• C. $6$
• D. $2$

Answer 1

The correct option is C $6$

Given, mean $=np=2.4$ and variance $=npq=1.44$

$\because q=1-p$
Solving these we get $p=\frac{2}{5},q=\frac{3}{5}$ and $n=6$