Question -
Answer -
Given 6 red balls, 5white balls and 5 blue balls
We can select 3 redballs from 6 red balls in 6C3 ways
Similarly, we canselect 3 white balls from 5 white balls in 5C3 ways
Similarly, we canselect 3 blue balls from 5 blue balls in 5C3 ways
∴ Number of waysof selecting 9 balls is 6C3 ×5C3 × 5C3
∴ Number of waysof selecting 9 balls from 6 red balls, 5 white balls and 5 blue balls if eachselection consists of 3 balls of each colour is 6C3 ×5C3 × 5C3 =2000