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Three balls are drawn one after the other with replacement, from a bag containing 5...

Mathematics
WAEC 1992
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
  • E. 5/243
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Correct Answer: Option C
Explanation
Total number of balls = 18
P(1R, 1W, 1B) = 5/18 x 9/18 x 4/18 = 5/162
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts