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CBSE XI
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Math
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Binomial Theorem
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If the $r^{th}$ term in the expansion of $(\large\frac{x}{3}-\frac{2}{x^2})^{10}$ contains $x^4$ then $r$ is equal to
$\begin{array}{1 1}(A)\;4\\(B)\;3\\(C)\;2\\(D)\;\text{none of these}\end{array} $
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