Question
A bag contains 5 violet, 16 blue and 7 grey balls. Two
balls are randomly drawn from the bag, what is the probability that a violet and a grey ball are drawn?Solution
The probability that a violet and a grey ball are drawn = (5C1 × 7C1)/28C2 = (5 × 7) / 378 = 35 / 378 = 5/54
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