Question on: JAMB Mathematics - 2022

Evaluate \(^{n^2 + 1}\)C\(_{n+5}\) if n = 3 

A

55

B

45

C

35

D

25

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Correct Option: B

\(^{3^2 + 1}\)C\(_{3+5}\)

\(^{9 + 1}\)C\(_{3+5}\) 

\(^{10}\)C\(_{8}\) = \(\frac{10!}{8! 2!}\)

\(\frac{10 * 9 * 8!}{8! 2!}\) = \(\frac{10 * 9}{2}\)

= 45

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