Question

A coin is tossed 3 times. Find the probability of getting exactly two head

Answer 1

In this problem, we have a binomial probability distribution

so

n=3

p=0.50

q=0.50

Find out P(X=2)

$P(X=2)=\frac{3!}{2!(3-2)!}*0.50^2*0.50^{(3-2)}$

P(X=2)=0.375