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
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
