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In an examination of Mathematics paper,t...

In an examination of Mathematics paper,there are "20" questions of equal marks and the question paper is divided into three sections : "A,B" and "C". A student is required to attempt total "15" questions taking at least "4" questions from each section.If section "A" has "8" questions,section "B" has "6" questions and section "C" has "6" questions, then the total number of ways a student can select "15" questions is

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