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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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