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Questions  >>  CBSE XI  >>  Math  >>  Binomial Theorem
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If $A$ and $B$ are coefficient of $x^n$ in the expansion of $(1+x)^{2n}$ and $(1+x)^{2n-1}$ respectively then $A/B$ equals

$\begin{array}{1 1}(A)\;1\\(B)\;2\\(C)\;\large\frac{1}{2}\\(D)\;\large\frac{1}{n}\end{array} $

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