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------------------------------------------------ Find the average (mean) of the following test scores:

83, 92, 47, 78, 80

A. 76
B. 70
C. 72
D. 83
E. 68

Answer :

To find the average (mean) of the given test scores, follow these steps:

1. List the scores: 83, 92, 47, 78, 80.

2. Add all the scores together:
[tex]\( 83 + 92 + 47 + 78 + 80 \)[/tex].

3. Calculate the total sum:
[tex]\( 83 + 92 = 175 \)[/tex] \\
[tex]\( 175 + 47 = 222 \)[/tex] \\
[tex]\( 222 + 78 = 300 \)[/tex] \\
[tex]\( 300 + 80 = 380 \)[/tex].

4. Count the number of scores: There are 5 scores.

5. Divide the total sum by the number of scores to find the average:
[tex]\[
\text{Mean} = \frac{\text{Total Sum}}{\text{Number of Scores}} = \frac{380}{5} = 76.
\][/tex]

So, the average (mean) score of the test scores is 76.

Therefore, the correct answer is:

A. 76

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