Question

write the class marks of 90 to 110 group

Answer 1

Class mark is the mid value of a class .
In the class 90 to 110 , the mid value i.e. class mark is 90+110/2 = 100
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Answer 2

The class marks of 90 - 110 = 100.

Step-by-step explanation:

We have,

Interval = 90 - 110

To find, the class marks of 90 - 110 = ?

∴ Interval = 90 - 110

Here. lower limit = 90 and upper limit = 110

We know that,

Class mark$=\dfrac{Upper limit+lower limit}{2}$

∴ Class mark$=\dfrac{110+90}{2}$

$=\dfrac{200}{2}$

= 100

Hence, the class marks of 90 - 110 = 100.