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The HR team collects the age of the staff of three departments and found the mean age of each department as below: Department Mean age

The HR team collects the age of the staff of three departments and found the mean age of each department as below:

Department Mean age Number of staff
A 36.1 24
B 39.3 26
C 42.7 36

Find the overall mean. (2 d.p)

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