Question

Find if the class mark and the class size of a class of a class are6 and 2then the upper limit of class is

Answer 1

12

Class mark = 6

Class size = 12

let x be the lower limit of the class, then the upper limit of the class will be x + 12, as

the class size is 12

class mark = (upper limit + lower limit)/2

6 = (x + x + 12)/2

6 = (2x + 12)/2

12 = 2x + 12

O = 2x

X = 0

Therefore, the upper class limit is 12

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