Question

A box contains 2 white balls 3 black balls and 4 red balls .In how many ways can 3 balls be drawn from the box ,it atleast one black ball is to be included in the draw

Answer 1

The answer is....

No. Of ways..=. 8c2 =28 ways..

Answer 2

we need to select 3 balls and 1 needs to be black all the time

so we need to select 2 balls from 8 (2+2+4) balls

8c2 =28