Question
A bag contains 10 black, 8 red and 12 yellow balls. Two
balls are randomly drawn from the bag, what is the probability that a red and a yellow ball are drawn?Solution
The probability that a red and a yellow ball are drawn = (8C1 × 12C1) / 30C2 = (8 × 12) / 435 = 96 / 435 = 32/145
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