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Find less than type cumulative frequency curve {{10-20,20-30,30-40,40-50,50-60},{15,25,20,12,8}}

Solution:
Your problem `->` less than type cumulative frequency curve {{10-20,20-30,30-40,40-50,50-60},{15,25,20,12,8}}


To draw Less than type cumulative frequency curve, we first prepare the following table

ClassFrequency
`f`
< Upper`cf`
0 - 10-100
10 - 20152015
20 - 30253040
30 - 40204060
40 - 50125072
50 - 6086080









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