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MCQ

If (1+ x)^{n} = C_{0} + C_{1}x + C_{2}x^{2} + …..C_{n}x^{n} , then C_{0}C^{2} + C_{1}C^{3} + C_{2}C^{4} + …..=C_{n-2} C_{n} is equal to:

#### Options

`"2n"/(("n - 2")("n - 2"))`

`"2n"/("n" . "n")`

`"2n"/(("n - 2")("n + 2"))`

none of these

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#### Solution

`"2n"/(("n - 2")("n + 2"))`

Concept: Number System (Entrance Exam)

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