Question

plz give answer fast​

Answer 1

Answer:

Formula :-

$class \: mark \: = \frac{upper \: limit + lower \: limit}{2}$

$= \frac{90 + 120}{2}$

$\frac{210}{2} = 105.$

therefore option d , 105 .

Answer 2

Answer: 105

Class mark is the mean of the upper and lower limit of the class interval = 2  

90+120

/2

=210/2

​  

= 105