prob of right-handed = .93
prob of NOT right-handed = .07
prob (7 of 9 are right-handed)
= C(9,7)(.93)^7(.07)^2
= appr. 0.10614
Data shows that 93% of the people in a certain population are right-handed. A group of 9 people from this population are selected at random. What is the probability that exactly 7 of the people in the group are right-handed?
2
1 answer
1 answer