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Mean, Median, Mode of Grouped Data — Maths STD 10 — Question

CBSE BoardEnglish MediumSTD 10MathsMean, Median, Mode of Grouped Data3 Marks
Question
In a frequency distribution table with 12 classes, the class width is 2.5 and the lowest class boundary is 8.1, then what is the upper class boundary of the highest class?
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Answer

Number of desses = 12
Class-width = 2.5
Lowest class boundary = 8.1
Thus, Upper class boundary of the highest class
= Lowest dass brundary + Class-width, x Number of classes
= 8.1 + 2.5 × 12
= 8.1 + 30
= 38.1

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