Question
A box contains 6 red balls, 5 green balls, and 4 blue
balls. Two balls are drawn at random. What is the probability that one ball is red and the other is blue?Solution
Total balls = 6 + 5 + 4 = 15. The probability of drawing one red and one blue ball = P(Red and Blue) = (6C1 × 4C1) / 15C2 = (6 × 4) / (15 × 14 / 2) = 24 / 105 = 8/35. Correct Option: d
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