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Permutations And Combinations

Question

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Prove that: $straight C presuperscript straight n subscript straight r. straight C presuperscript straight r subscript straight s space equals space straight C presuperscript straight n subscript straight s. space straight C presuperscript straight n minus straight s end presuperscript subscript straight r minus straight s end subscript$

Solution

Solution not provided.

Some More Questions From Permutations and Combinations Chapter

Determine K, so that K + 2, 4K – 6 and 3K – 2 are three consecutive terms of an A.P.

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Mock Test Series

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