Find the number of ways of selecting 6 out of 1... - JAMB Mathematics 2008 Question

(^{10}C_{6})

(\frac{10!}{(n - r)!r!})

n = 10, r = 6

= (\frac{10!}{(10 - 6)!6!})

= (\frac{10!}{4!6!})

= (\frac{10 \times 9 \times 8 \times 7}{4 \times 3 \times 2 \times 1})

= 5 x 3 x 2 x 7

= 210