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dingdong
Lv 6
Five students scored 80 on a test, five students scored 85, and five students scored 90. What is the mean equal to?
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- -j.Lv 72 years agoFavorite Answer
The mean is the total of all the scores, divided by the number of scores.
Total of all the scores: (5 * 80) + (5 * 85) + (5 * 90) =
(400) + (425) + (450) =
1,275
number of scores = 15 students
So
mean = total of scores / number of scores
mean = 1,275 / 15
mean = 85
Hope that helps!
- 2 years ago
(80 * 5 + 85 * 5 + 90 * 5) / (5 + 5 + 5)
5 * (80 + 85 + 90) / 15
(80 + 85 + 90) / 3
255 / 3
85
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- Anonymous2 years ago
The mean is 85
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