According to a recent survey, 10% of the population is left handed. If you randomly select 4 people what is the probability that at least one of them is left handed?

Question

Probability - statistics

Answer 1

1/10 chance of one left handed for 1 person

Probability of no left handed is 1-1/10 = 9/10

in 4 people probability of no left hander is (.9)^4 = .6561

Probability of at least one left hander = 1- .6561 = .3439 = 34.39%

Probability of at least one left hander is the same as 1 minus the probability of no left handers