If for positive integers $r > 1,n > 2$ the coefficient of the ${(3r)^{th}}$ and ${(r + 2)^{th}}$ powers of $x$ in the expansion of ${(1 + x)^{2n}}$ are equal, then
If for positive integers $r > 1,n > 2$ the coefficient of the ${(3r)^{th}}$ and ${(r + 2)^{th}}$ powers of $x$ in the expansion of ${(1 + x)^{2n}}$ are equal, then
- [AIEEE 2002]
- [IIT 1983]
- A
$n = 2r$
- B
$n = 3r$
- C
$n = 2r + 1$
- D
None of these
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- [JEE MAIN 2020]
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