In a library there are (2n+1) books. If a student selects atleast (n+1) books in 256 ways then the number of books in library??
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by permutation and combinations
2n+1cn+1= 256
now by hit nd trial method we get value of
n=which is not possible for any integer
2n+1cn+1= 256
now by hit nd trial method we get value of
n=which is not possible for any integer
harsha250101:
Please give me a neat explanation and quick answer
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