Answer:
The list represents the ages of students in a gymnastics class.
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8, 8, 8, 9, 9, 10, 10, 10, 11, 12
If another student of age 10 joins the class, how is the mean affected?
The mean will remain the same at 10.
The mean will remain the same at about 9.5.
The mean will increase to about 10.2.
The mean will decrease to about 9.
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Explanation:
8 + 8 + 8 + 9 + 9 + 10 + 10+ 10 + 11 + 12
= 95
95 ÷ 10
=9.5
8 + 8 + 8 + 9 + 9 + 10 + 10 + 10+ 10 + 11 + 12
= 105
105 ÷ 11
= 9.54.....
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