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Permutations and Combinations
Question
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Find r, if P (10, r + 1) : P(11, r) = 30 : 11

Answer

Solution not provided.
Ans. 5

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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.