question on permutation in class XI:-find n if P(2n+1,n-1):P(n-2,4) =57:16?
- Manasa SharmaLv 49 years agoFavorite Answer
by applying npr
P(n,r) = n! / (n - r)!
you get the equation like this (2n=1)/(n-2)(n-3)(n-4)(n-5)=57/16
by solving these one you will get the values of n
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