If x-72 -36 -2-1- then x isA- EvenB- None of theseC- OddD- Divisible by 71

The correct option is C Odd We know that ^2nC_n is even ∴72!/(36!)^2=^72C_36 is even ⇒ x is odd ...

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One - One function

If x=72 !/36 ...

Question

If $x = \frac{72!}{(36!)^{2}} - 1$ , then x is

Odd

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Divisible by 71

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Even

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None of these

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Solution

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\frac{72!}{36! 36!} - 1

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