The following data gives the number of residents in an area based on their age. Find the average age of the residents.

Gap-fill exercise

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!

Age	Number of Residence(f)	Mid Value(x)	fx
0-8	2	4	8
8-16	6	12	72
16-24	9	20	180
24-32	7	28
32-40	4	36	144
40-48	2	44	88
	Σf=		Σx=