The mean of 5 numbers is 18. If one number is excluded, their mean is 16. Find the excluded number.

Explanation

To find the excluded number, we can follow these steps:

### Step 1: Calculate the total sum of the 5 numbers
Given that the mean of 5 numbers is 18, we can calculate the total sum of these numbers using the formula for the mean:

\[ \text{Mean} = \frac{\text{Sum of numbers}}{\text{Number of numbers}} \]
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