JAMB 2018 · UTME · Q27

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

Worked solution (try it first)

The order of the subjects doesn't matter, so this is $^{10}C_6$ , which is the same as $^{10}C_4$ .
$^{10}C_4 = \dfrac{10 \times 9 \times 8 \times 7}{4 \times 3 \times 2 \times 1}$
$= \dfrac{5040}{24}$ .
That is 210, option D.