Mathematics
Grade-4-
Easy
Question
A group of customer service surveys was sent out at random. The scores were 90, 50, 70, 80, 60, 20, 90 and 20. The mean score is _______.
- 20
- 40
- 60
- 80
Hint:
Mean score = sum of all scores / Total number of scores
The correct answer is: 60
Here, we have to find the mean score of a group of customer service surveys.
Scores were 90, 50 , 70 , 80 , 60 , 20 , 90 , 90 , and 20 .
Sum = 90 + 50 + 70 + 80 + 60 + 20 + 90 + 20 = 480.
Number of scores = 8
Therefore, Mean score = 480/8 = 60
Hence, the correct option is (c).
Mean of a data is the sum of all values divided by the total number of values, it is also called average.
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