Permutations And Combinations

Question
CBSEENMA11014089

If fraction numerator left parenthesis straight n minus 1 right parenthesis factorial over denominator left parenthesis straight n minus 4 right parenthesis factorial end fraction colon fraction numerator straight n factorial over denominator left parenthesis straight n minus 4 right parenthesis factorial end fraction space equals space 1 space colon space 9

find value of n.

Solution

Solution not provided.
Ans.  9

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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.