Question

Draw the frequency distribution table and find the average of the following data.
10,15,20,10,10,25,20,15,25,20

Answer 1

Number	Tally Marks	Frequency	Frequency x number
10	III	3	10 x 3 = 30
15	II	2	15 x 2 = 30
20	III	3	20 x 3 = 60
25	II	2	25 x 2 = 50
		Total = 10	Total = 170

Average of the given data = ΣFx/ΣF = 170/10 = 17.