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Question

If $^{n} C_{3} =^{n} C_{13}$ , then $^{20} C_{n}$ is.
$1825$
$3801$
$4845$
$300$

A

4845

B

300

C

1825

D

3801

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Solution

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We know that ${n_{C}}_{r} = {n_{C}}_{n - r}$

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