(Answered) You are given two boxes one of them containing 900 red

Statistics

You are given two boxes: one of them containing 900 red marbles and 100 blue marbles, the other one contains 500 red marbles and 500 blue marbles.

(a) If we pick one of the boxes randomly. and pick a marble what is the probability that it is blue?

(b) If we see that the marble is blue. what is the probability that it is chosen from box 1?

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