Three balls are drawn one after the other with ... - WAEC Mathematics 1992 Question
Three balls are drawn one after the other with replacement, from a bag containing 5 red, 9white and 4 blue identical balls, What is the probability that they are one red, one white and one blue?
A
5/102
B
5/136
C
5/162
D
5/204
correct option: c
Total number of balls = 18
P(1R, 1W, 1B) = 5/18 x 9/18 x 4/18 = 5/162
P(1R, 1W, 1B) = 5/18 x 9/18 x 4/18 = 5/162
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