Advertisement Remove all ads
MCQ
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
Advertisement Remove all ads
Solution
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`
Concept: Permutation and Combination (Entrance Exam)
Is there an error in this question or solution?
Advertisement Remove all ads
Advertisement Remove all ads
