What is the mean of 70, 75, 80, 85, and 90?
80
70
75
90
8(ii) State the modal Class
The following table gives the weekly wages of workers in a factory
Weekly Wages
50-55
55-60
60-65
65-70
70-75
75-80
80-85
85-90
No. of workers
5
20
10
9
6
12
8
Calculate
(i) the mean