Question: QUESTION 2 1 C ( n , r ) = a . n ! ( n - r ) ! where 1 r n b

QUESTION 21C(n,r)= a.n!(n-r)! where 1rn b.n!r!(n-r)! where 1rn c.r!n!(n-r)! where 1rn d.r!n! where 1rn QUESTION 21C(n,r)= a.n!(n-r)! where 1rn b.n!r!(n-r)! where 1rn c.r!n!(n-r)! where

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