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Class Marks

Class-mark of...

Question

Class-mark of the class-interval 35 - 55 is

A

35

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B

45

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C

55

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D

90

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Solution

The correct option is B
45

Class-mark = $\frac{l o w e r c l a s s l i m i t + u p p e r c l a s s l i m i t}{2}$

Hence, Class-mark = $\frac{35 + 55}{2}$ = 45

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(c) the class intervals when changed into overlapping class interval

Q. Find the class marks of classes 10−25 and 35−55.

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Question 69

If the fifth class interval is 60-65 and fourth class interval is 55-60, then the first class interval is 45-50. ?

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