[" Let the co-efficients of "x^(n)" in "...

[" Let the co-efficients of "x^(n)" in "(1+x)^(2n)&(1+x)^(2n-1)" be "P&Q" respectively,then "((P+Q)/(Q))^(5)=],[[" (A) "9," (B) "27," (C) "81," (D) none of these "]]

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