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21.A student has to answer 10 questions,...

21.A student has to answer 10 questions, choosing at least 4 fromeach of part A and B. If there are 6 questions in part A and 7 inpart B. In how many ways can the student choose 10 questions?

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CBSE COMPLEMENTARY MATERIAL-PERMUTATIONS AND COMBINATIONS -Section - C(Short answer type question)
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  14. Prove that 33! Is divisible by 2^(19) and what is the largest integer ...

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  17. A group consists of 4 girls and 7 boys. In how many ways can a team of...

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