A student is allowed to select atleast one and atmost \( \mathrm{n}...

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A student is allowed to select atleast one and atmost \( \mathrm{n} \) books from a collection of \( (2 \mathrm{n}+1) \) books. If the total number of ways in which he can select books is \( 63\), find the value of \( n \).
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