Out of 10 persons working on a project, 4 are graduates. If 3 are selected, what is the probability that there is at least one graduate among them?
Q1. Out of 10 persons working on a project, 4 are graduates. If 3 are selected, what is the probability that there is at least one graduate among them?
Answer: 05-Jun
Explanation: P(at least 1 graduate) = 1 − C(6,3)/C(10,3) = 1 − 20/120 = 100/120 = 5/6.