A is a set containing n elements. A subset `P_1` of A is chosen. The set A is reconstructed by replacing the elements P Next, a of subset `P_2` of A is chosen and again the set is reconstructed by replacing the elements of `P_2`, In this way, m subsets `P_1, P_2....,P_m` of A are chosen. The number of ways of choosing `P_1,P_2,P_3,P_4...P_m`

Explanation

To solve the problem, we need to determine the number of ways to choose m subsets \( P_1, P_2, \ldots, P_m \) from a set \( A \) containing \( n \) elements.

### Step-by-Step Solution:

1. **Understanding the Set**:
Let \( A = \{ a_1, a_2, a_3, \ldots, a_n \} \) be the set containing \( n \) elements.

2. **Choosing Subsets**:
...