Write the class size of $100 - 120, 120 - 140, 140 - 160$

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Solution

Find the class size
$C l a s s s i z e = U p p e r C l a s s L i m i t - L o w e r C l a s s L i m i t$
Calculating the Class size
$120 - 100 = 20 140 - 120 = 20 160 - 140 = 20$
Therefore, Class size in this case is $20$

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Use appropriate method.

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Write the class size of 100-120,120-140,140-160

Find the class sizeClasssize=UpperClassLimit-LowerClassLimitCalculating the Class size120-100=20140-120=20160-140=20Therefore, Class size in this case is 20

Write the class size of $100 - 120, 120 - 140, 140 - 160$

Find the class size
$C l a s s s i z e = U p p e r C l a s s L i m i t - L o w e r C l a s s L i m i t$
Calculating the Class size
$120 - 100 = 20 140 - 120 = 20 160 - 140 = 20$
Therefore, Class size in this case is $20$