If 10 different balls are to be placed in 4 distinct boxes at random,
Question:

If 10 different balls are to be placed in 4 distinct boxes at random, then the probability that two of these boxes contain exactly 2 and 3 balls is :

1. $\frac{945}{2^{11}}$

2. $\frac{965}{2^{11}}$

3. $\frac{945}{2^{10}}$

4. $\frac{965}{2^{10}}$

Correct Option: , 3

Solution: