Question

The width of the class -interval 45-55 is..............
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Answer 1

10

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Answer 2

Answer:

Class width is 10

Class mark is 50

Step-by-step explanation:

Class width is difference between the upper class limit and lower class limit  here

upper class limit is 55   and  lower class limit is 45

Therefore   the class width is = 55 - 45 = 10

Class mark =  upper class limit + lower class limit / 2

= 55 + 45 / 2 = 100 /2 = 50