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Permutations And Combinations

Question
CBSEENMA11014278

If WiredFaculty and straight C presuperscript straight n subscript straight r equals 120, find value of straight C presuperscript 6 subscript straight r

Solution

Solution not provided.
Ans. 20

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.