2- The following data represent the number of miles run during one week for a sample of 20 runners.
Class limits
Freq.
Xm
f.Xm
f.Xm2
6 - 10
3
11 - 15
2
16 - 20
1
21 - 25
6
26 - 30
31 - 35
5
Total
c) Find the modal class
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