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OpenStudy (anonymous):
A pair of fair dice is rolled. What is the probability that the number landing uppermost on the first die is a 4 if it is known that the sum of the numbers landing uppermost is 7?
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OpenStudy (anonymous):
need to start counting - how many combinations of both dice are there that make up 7? List them out if it helps! and then find how many of these combinations have a 4.
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