In testing a new drug, researchers found that 20% of all patients using it will have a mild side effect. A random sample of 25 patients using the drug is selected. Find the mean and standard deviation of patients having a mild side effect.

Mean = np = 25(.2) = 5 Ok

Standard deviation = sqrt (n*p*q) = sqrt ((25 * .2*.8)) = sqrt (4)

= 2
I have gotten this far but stuck on the finishing part can any one help me.

Thanks