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Statistics — MATHS STD 9 — Question

Rajasthan BoardEnglish MediumSTD 9MATHSStatistics1 Mark
Question
What is the class Mark of the interval 15 - 20?
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Answer

  1. 17.5
Solution:
Class mark is the mid-value of each class interval.
For class interval 15 - 20
Class mark $=\frac{15+20}{2}=\frac{35}{2}=17.5$

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