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1. A coin is flipped until heads appear for the first time. Find the probability the number of attempts will be greater than 2, but

1. A coin is flipped until heads appear for the first time. Find the probability the number of attempts will be greater than 2, but less than 5.

2. A fair die was rolled several times, and the mathematical expectation of the numerical sum of the outcomes turned out to be 56. How many times the die was rolled?

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