12.5 is the class mark of the class interval
12.5 is the class mark of the class interval
A) 10 – 15
B) 0 – 25
C) Both A and B
D) None
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Correct option is (C) Both A and B
\(\because\) Class mark \(=\frac{\text{lower limit of class + upper limit of class}}2\)
\(\therefore\) Class mark of the class interval 10–15 \(=\frac{10+15}2\)
\(=\frac{25}2\) = 12.5
Class mark of the class interval 0–25 \(=\frac{0+25}2\)
\(=\frac{25}2\) = 12.5
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