The mean of 24 test scores is 77.5. When the 25th class member takes the test, the mean down by 1.1 points. What was that 25h score?

Explanation

To solve the problem step-by-step, we can follow these calculations:

### Step 1: Calculate the sum of the first 24 test scores.
Given that the mean of the 24 test scores is 77.5, we can use the formula for the mean:

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