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2. A card is chosen from a deck of cards. If it is a 9 or...

2. A card is chosen from a deck of cards. If it is a 9 or a 10, you choose a ball from box 1.   Otherwise you choose a ball from box 2. Box 1 contains 4 blue balls and 9 white balls. Box 2 contains 4 white balls and 7 blue balls. What is the probability that you end up with a blue ball? (3)

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Answer #1

This question is based on the conditional theorem of probability.

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