The total number not more than 20 digits that are formed by usingd the digits 0, 1, 2, 3, and 4 is a. `5^(20)` b. `5^(20)-1` c. `5^(20)+1` d. none of these

Options

A. `5^(20)`
B. `5^(20)-1`
C. `5^(20)+1`
D. none of these

Explanation

To solve the problem of finding the total number of numbers that can be formed using the digits 0, 1, 2, 3, and 4 with a maximum of 20 digits, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Digits**: We have the digits 0, 1, 2, 3, and 4. This gives us a total of 5 digits to work with.

2. **Determine the Length of Numbers**: The problem states that we need to form numbers that are not more than 20 digits long. This means we can have numbers with lengths ranging from 1 digit up to 20 digits.

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