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Find the number of ways of selecting 6 out of 10 subjects for an examination

Mathematics
JAMB 2008

Find the number of ways of selecting 6 out of 10 subjects for an examination

  • A. 128
  • 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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WAEC and NECO CBT App for Mobile Devices - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
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