There are four parcels and five post-offices. In how many different ways can the parcels be sent by registered post?

Explanation

To determine the number of different ways to send 4 parcels through 5 post offices, we can follow these steps:

### Step-by-step Solution:

1. **Identify the number of parcels and post offices**:
We have 4 parcels (let's denote them as P1, P2, P3, P4) and 5 post offices.

2. **Determine the choices for each parcel**:
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