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Finding the Probability of a Box

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Given: 2 identical boxes. One contains 10 balls number 1-10 the other 100 balls 1-100. You don't know if the box on the left contains 10 or 100. You flip a coin to choose one of the boxes and ask a friend to pick a ball at random from it. The ball he picks has a number 9 written on it.

Find: What is the probability that the box you choose contains 10 balls

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This solution helps find the probability of a box.

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Given: 2 identical boxes. one contains 10 balls number 1-10 the other 100 balls 1-100. you don't know if the box on the left contains 10 or 100. you flip a coin to choos one of the boxes and ask a friend to ...

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