Q.
The product of first n odd natural numbers equals
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a
2nCn nPn
b
12n 2nCn nPn
c
14n 2nCn 2nPn
d
none of these
answer is B.
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Detailed Solution
1.3.5…(2n−1)=(2n)!2n(n!)=12n 2nCn nPn
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