Solved Paper-II On Topic : Solved Paper-II June-2019

Que : 1 . How many are there to place 8 indistinguishable balls into four distinguishable bins?

1. 70
2. 165
3. 8C4
4. 8C4T
Please Select Ans Options .
Explanation

Option 2 is Correct Answer
This is precisely the problem we saw to solve the r-combination with repetition:
= C(8+4-1,8)
= 11 C​ 8
= 11! / (8!(11-8)!)
= 165