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Five people are passing a ball amongst themselves. The ball starts with Alonzo. Each person who has the ball passes it onto someone else. After the eighth pass, the ball returns to Alonzo. Find the number of possible sequences of passes.

 Jun 18, 2020
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The number of ways is 5^7*3 + 5^6*4*3 = 421875.

 Jun 19, 2020

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