Question
Find the class marks of classes 10-25 and 35-55.
✓
Answer
Class- mark of the 10-25 $=\frac{10+25}{2}=\frac{35}{2}=17.5$
Class-mark of class 35-55 $\frac{35+55}{2}=\frac{90}{2}=45$
Class-mark of class 35-55 $\frac{35+55}{2}=\frac{90}{2}=45$
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