Asked by ME

simplify 9C4! . . . . . . . . . . . . . . . . . . . . . . A. 126 . B. 15,120 . C. 5 . D. 3,024******
Answered by Steve
I assume you mean 9C4

9C4! = 0

Anyway,

9C4 = 9!/(5!4!) = 9*8*7*6 / 4*2*3*1 = 126

9P4 = 9!/5! = 9*8*7*6 = 3024
Answered by Me
thank you!
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2020
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For 9C4 the answer is 126
Just did the test.
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