Question
A box contains 12 black, 8 red and 10 green marbles. Two
marbles are randomly selected from the box, what is the probability that a black and a green marble are drawn?Solution
The probability that a black and a green marble are drawn = (12C₁ × 10C₁ )/30C2
= (12 × 10)/435 = 120/435 = 8/29
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