Mathematics
JAMB 2007
In how many ways can 6 subjects be selected from 10 subjects for an examination
-
A.
218
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B.
216
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C.
215
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D.
210
Correct Answer: Option D
Explanation
\(^{10}C_6 = \frac{10!}{(10-6)!6!}=\frac{10!}{4!6!}\\
=\frac{(10\times 9\times 8\times 7 \times 6!)}{4\times 3\times 2\times 1\times 6!}\\
=210\)
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