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14 January, 15:17

How do I solve this problem and show my work? A group of 71 friends meet for lunch. They greet each other by exchanging first bumps. How many fist bumps are exchanged if each friend must bump with each of the 70 others?

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  1. 14 January, 15:40
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    Well first u would one of the friend and so 71 - 1=70. Then yall would make a line and then one by one u would go down the line.
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