A person wants to buy one fountain pen, one ball pen and one pencil from a stationery shop. If there are 10 fountain pen verities, 12 ball pen varieties and 5 pencil varieties in how many ways can he select these articles?

Explanation

Thus, the number of ways to select one fountain pen, one ball pen and one pencil from a stationery shop is

`10_(C_1) xx 12_(C_1) xx5_(C_1) = 10 xx 12 xx 5 = 600` ways.