Answer to Question #91968 in Statistics and Probability for REHM

Question #91968

An urn consists of 8 balls including 5 white balls and 3 black balls. 4 balls are drawn at random. What is the probability that exactly 2 balls are black?

Expert's answer

P = (C₃² * C₅²)/C₈⁴ = 3*10/70 = 3/7

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