Two years ago the mean age of 40 people was 11 years. Now a person left the groun
The mean age is changed to 12 years. Find the age of the person who left the group
the data 5 8 10 15 22 from their
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Answer:
4o-11
12-?
Step-by-step explanation:
12×11/40×1
132÷40
=12
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