Question

find the class mark of class 90 120

Answer 1

Class mark = upper limit + lower limit / 2
therefore class mark = 120 + 90 / 2
= 210 / 2 = 105.

hope it would help you..

Answer 2

Answer:

Class mark of (90-120) = 105

Step-by-step explanation:

Given class interval (90 - 120)

lower limit = 90,

upper limit = 120

$\boxed {class\:mark \:(x)\\\\=\frac{(lower\:limit+upper\:limit)}{2}}$

$class\:mark \:(x)\\=\frac{(90+120)}{2}$

$x = \frac{210}{2}$

$x=105$

Therefore,

Class mark of (90-120) = 105

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