In how many ways can six persons be paired?

Question 1 Report

In how many ways can six persons be paired?

5

10

15

20

Answer Details

6C $_{2} = \frac{6!}{[6 - 2]! [2!]}$

$\frac{6 * 5 * 4!}{4! * 2!}$

= $\frac{6 * 5}{2}$

= 15

Read lesson note on Permutation And Combinations (WAEC)

Permutation And Combinations

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