Question
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: Option D
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P(at least one graduate) = 1 - P(no graduates)
= 1 - â¶C₃/¹â°C₃ = 1 - (6 * 5 * 4)/(10 * 9 * 8) = 5/6
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