Subject
Bank Exam
Topic
Uttara Bank Limited (PO)-17.09.2021
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?
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?
ক)
1/6খ)
5/8গ)
3/8ঘ)
5/6Explanation
P(at least one graduate) = 1 − P(no graduates) = 1 − 6 C 3 / 10 C 3 = 1 − 6×5×4/10×9×8 = 1 − 1/6 = 5/6Related questions
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