`C(n,7)=C(n,5)`

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If C (n,10) =C(n,12) , dertermine C(n,5)

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If ""^(n)C_(7)=""^(n)C_(5) , find ""^(n)C_(4) .

(i) .^(n)C_(7)=.^(n)C_(5) , find n. (ii) If.^(n)C_(14)=.^(n)C_(16) , find .^(n)C_(28) .

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If .^(n)C_(7)=^(n)C_(11) , show that .^(21)C_(n)=1330 .