Chapter 5, Problem 10PS

Determine the mean and standard deviation of the variable $X$ in each of the following binomial distributions:

$\begin{array}{l}\text{a}\text{.}n=4\text{and}\pi =0.10\\ \text{b}\text{.}n=4\text{and}\pi =\text{0}\text{.40}\\ \text{c}\text{.}n=5\text{and}\pi =0.80\\ \text{d}\text{.}n=3\text{and}\pi =0.50\end{array}$