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In .^(2n)C(3) :.^(n)C(3) = 11 : 1 then...

In ` .^(2n)C_(3) :.^(n)C_(3) = 11 : 1 ` then n is

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The correct Answer is:
(i)=n=5 ,(ii) =n=6
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FULL MARKS-COMBINATORICS AND MATHEMATICAL INDUCTION-ADDITIONAL QUESTIONS
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  6. If ""^(nP(r)=""^(n)P(r+1) and ""^(n)C(r)=""^(n)C(r-1) find n and r.

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  7. A committee of 7 peoples has to be formed from 9 men and 4 women . In ...

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  8. In .^(2n)C(3) :.^(n)C(3) = 11 : 1 then n is

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  10. If 1/(7!)+1/(9!)=x/(10!), find x.

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  18. Prove that For any natural number n, 7^n - 2^n is divisible by 5.

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