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How many ways can three 100 winners be chosen from a crowd of 20 people?
Wiki User
∙ 14y ago
"Any a from b" is calculated using factorials ("x!") in the formula b!/ (b - a)! x a!
In this case a = 3 and b = 20 so you have 20!/(20 - 3)! x 3! which simplifies to 20 x 19 x 18/ 3 x 2 = 1140
Wiki User
∙ 14y ago
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