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In how many ways can the letters LEADER be arranged?

Mathematics
JAMB 2018

In how many ways can the letters LEADER be arranged?

  • A. 72
  • B. 144
  • C. 360
  • D. 720
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Correct Answer: Option C
Explanation

The word LEADER has 1L 2E 1A 1D and 1R making total of 6! \(\frac{6}{1!2!1!1!1!}\) = \(\frac{6!}{2!}\)

  = \(\frac{6 \times 5 \times 4 \times 3 \times 2 \times 1}{2 \times 1}\)

  = 360

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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