If npr = 3024 and ncr = 24 , then find r =
Its a question from permutation and combination
Pls any one do it..
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If npr = 3024 and ncr = 24 , then find r =
Its a question from permutation and combination
Pls any one do it..
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n! / (n-r)! = 3024 ........................... i
nCr means
n!/r!(n-r)! = 24
so, it can b written as....
n! / (n-r)! = 24*r!..............................ii
equating i and ii
3024 = 24* r!
3024/24 = r!
126 = r!