question_answer

Following are the data obtained for the number of females staff in the school working for various positions in various age groups. Find the mean deviation of the age from the mean age of the female in the school. The data is given below:

Age	10-20	20-30	30-40	40-50	50-60	60-70	70-80
Number	2	3	8	14	8	3	2

A)  10.9

B)  11.1

C)  9.9

D)  10

E)  None of these