SOLUTION: nCn-4=15 find value of n

Question 1126717: nCn-4=15 find value of n
Answer by ikleyn(52781) (Show Source): You can put this solution on YOUR website!
.

The left side is   = .


The equation is


  = 15,    or


n*(n-1)*(n-2)*(n-3) = 24*15 = 360.


The solution is  n = 6.


Check.   =  = 15.   ! Correct !

Solved.

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