MathematicsIn a frequency distribution table with 12 classes, the class width is 2.5 and the lowest class boundary is 8 then what is the upper class boundary of the highest class?

In a frequency distribution table with 12 classes, the class width is 2.5 and the lowest class boundary is 8 then what is the upper class boundary of the highest class?

A
38
B
39
C
38.5
D
37.5

Solution:

Upper class boundary of highest class $= 8 + 12 (2.5) = 8 + 30.0 = 38$ .

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