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#10
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C(N,R) = N!/[(N-R!) * R!]
! is the symbol for factorial. It's the multiplication of all the numbers between 1 and itself. So: 4! = 4 * 3 * 2 * 1 8! = 8 * 7 * 6 * 5 * 4 * 3 * 2 * 1 |
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