Question

A box contains 4 red, 3 white, and 2 blue balls. Three balls are drawn at random. Find out the number of ways of selecting the balls of different colours.

Options

• 12

• 24

• 48

• 168

Answer 1

24
Explanation:
1 red ball can be selected in `""^4C_1` ways

1 white ball can be selected in `""^3C_1` ways

1 blue ball can be selected in `""^2C_1` ways

Total number of ways

= `""^4C_1xx""^3C_1xx""^2C_1=4xx3xx2=24`