If Class Mark Is 25 and Class Width Is 10, Then Find the Class

By Team Aakash Byju's | 9th November 2022

Let us find the lower limit and upper limit of the class using the given data. 

Class Width = 10 Class Mark = 25

Given,

Since the class width is 10, the difference between upper-class limit U and lower-class limit L  will be 10.

U - L = 10 or  U = L + 10

We know that the class mark is the average of the lower-class limit and upper-class limit.

Class Mark

U + L

2

25

L + 10 +L

2

=

=

=

>

Solve for L, the lower-class limit.

50 = 2L + 10

50 - 10

2

=  L

L = 20

=

>

=

>

=

>

So, using the value of L, find the value of U as U − L = 10.

=> U = 10 + L = 10 + 20 => U = 30

Since the lower-class limit is 20 and the upper limit of the class is 30, the class = 20 − 30.

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