Question
A bag contains 5 red balls, 7 blue balls, and 8 green
balls. If two balls are drawn at random without replacement, what is the probability that both are blue?Solution
ATQ, Total balls = 5 + 7 + 8 = 20 Probability of first blue = 7/20 Probability of second blue = 6/19 So probability = 7/20 x 6/19 = 42/380 = 21/190
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