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ParthKohli
 one year ago
Best ResponseYou've already chosen the best response.3\[nPr = \dfrac{n!}{(n  r)!} \ \ \ \ \quad nCr = \dfrac{n!}{(n  r)!r!}\]

ParthKohli
 one year ago
Best ResponseYou've already chosen the best response.3Where \(n! = n \times (n  1) \times (n  2) \cdots 1\)

Chelsea04
 one year ago
Best ResponseYou've already chosen the best response.0oh right...my mind just blanked... Thank you @ParthKohli

ParthKohli
 one year ago
Best ResponseYou've already chosen the best response.3For example:\[9C4 = \dfrac{9!}{(9  4)!4!} = \dfrac{9!}{5!4!} = \dfrac{9 \times 8 \times 7 \times 6}{4 \times 3 \times 2}\]
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