Find the number of different signals that can be generated by arranging at least 2 flags in order (one below the other) on a vertical staff, if five different flags are available.

Explanation

To find the number of different signals that can be generated by arranging at least 2 flags in order (one below the other) on a vertical staff, given that there are 5 different flags available, we can break the problem down into several steps:

### Step 1: Calculate the arrangements for 2 flags
When arranging 2 flags:
- For the first flag, we have 5 options (since all flags are available).
- For the second flag, we have 4 options (since one flag has already been used).

Thus, the total arrangements for 2 flags can be calculated as:
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