High blood pressure- Twenty percent of Americans ages 25 to 74 have high blood pressure. If 16 randomly selected Americans ages 25 to 74 are selected, find each probability. b. one-half will have high...

High blood pressure- Twenty percent of Americans ages 25 to 74 have high blood pressure. If 16 randomly selected Americans ages 25 to 74 are selected, find each probability.

b. one-half will have high blood pressure.

please give answer explanation step by step please.