Neco Model Questions Vol1 2020 Mathematics Question 9
Practice objective / multiple choice question 9 from the 2020 Neco Model Questions Vol1 Mathematics examination.
A box is chosen at random from three boxes: Box A contains 2 white and 3 black balls, Box B contains 4 white and 1 black ball, and Box C contains 3 white and 2 black balls. Three balls are drawn sequentially without replacement from the selected box. It is observed that the first two balls drawn are white. (a) What is the probability that the selected box was Box B? (b) Given this information, what is the probability that the third ball drawn is black? Express your final answer as a simplified fraction.
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About This Question
This is Neco Model Questions Vol1 2020 Mathematics Question 9. It is one of the objective questions from the 2020 Neco Model Questions Vol1 Mathematics examination.
Difficulty level: Hard .
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