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In how many ways can 6 subjects be selected from 10 subjects for an examination

Mathematics
JAMB 2007

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

There is an explanation video available below.


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Explanation Video

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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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