Question

The width or size of the class interval 30-40 is​

Answer 1

Answer:

the class mark of class interval 30 - 40 is " 35

Step-by-step explanation:

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Answer 2

Answer:

Class size = Upper Limit - Lower Limit

In this case,

Upper Limit = 40

Lower Limit = 30

Hence, Class Size = (40 - 30)

= 10