JUST A LITTLE APPLICATION OF PERMUTATION AND COMBINATION FORMULA
Level
pending
IF c(n,r)=c(n,n-r) then the value of n is
2r
3r
3/2r
4r
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1 solution
simply by formula of P & C , if c(n,r)=c(n,n-r) then r=n-r on simlification we will get the result.