devarshi-dt-logo

Question:

If 12 distinct balls are to be placed in 3 identical boxes, then the probability that one of the boxes contains exactly 3 balls is?

22(13)11

553(23)11

228(23)12

55(23)11

Solution:

We are assuming that the given balls are different.
n(S)=312 since each ball will go in three ways.