Answer:
Class mark of the class interval 40-50 is 45
Explanations:
Given class interval (46-50)
Lower limit = 46
Upper limit = 50
\boxed{\green{{class \: mark(x) = \frac{lower \: limit \: + \: upper \: limit}{2} }}}
classmark(x)=
2
lowerlimit+upperlimit
Class mark = \frac{46+50}{2}
2
46+50
⇒ x = \frac{96}{2}
2
96
⇒ x = 48
Therefore,
Class mark of the class interval 40-50 is 48
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