Permutations and Combinations
A box contains two white balls, three black balls and four red balls. In how many ways can three balls be drawn from the box if at least one black ball is to be included in the draw
- none of these
Correct Answer: Option(a)
Solution: No. of ways in which balls can be drawn from the box containing white. black and red balls such that at least black ball is included in the drawn from the box.
No. of ways in which 3 balls can be drawn from the box such that no black ball is included in the draw,