Question

if class mark is 25 and class width is 10 then find the class

Answer 1

lower term be x and upper term be y

25 = (x + y)/2
50= x+y ...(1)

class width =y -x
10= y- x .... (2)

on subtracting (1) and (2)

50 -10 = (x+y)-(y-x)
40=x+y-y+x
40=2x
x=20

putting x in (2)
10=y-x
10=y-20
y=30

☆☆ :)

Answer 2

If one class mark is 25
and Thier width(difference) is 10
therefore the class is 25-35

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