The chances of a person having suffered a heart attack are 5

The chances of a person having suffered a heart attack are 56%. If 8 people are chosen, find the probability that at least three of them will have a heart attack.

Solution

X represents number of persons having heart attack

X ~ B(8,0.56)

P(X >=3) = 1 - P(X<=2)

= 1 - 0.079425 = 0.920575

We use excel function binomdist(2,8,0.56,1) to find probability