If nCn-2=462 then n=? A7 b8 c 10 d11
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nCn-2=462
n!/{(n-2)!(n-n+2)!}=462
{n(n-1)(n-2)!}÷(n-2)!(2)=462
n(n-1)÷2=462
n2-n-924=0
Something wrong
n!/{(n-2)!(n-n+2)!}=462
{n(n-1)(n-2)!}÷(n-2)!(2)=462
n(n-1)÷2=462
n2-n-924=0
Something wrong
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