how to find the width and classmark with example
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you can find width by upper limit - lower limit ...as for example...5 -10,10-15,15-20
so width is upper limit 10 - lower limit 5 = 5
now class mark..(upper limit + lower limit)/2 as for example (10 +5)/2=15/2=7.5
Hope it will help u....!!!!!!!!!plz mark as brainlliest....