Question

The class mark of the class 90-130 is​

Answer 1

Answer:

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

90+130/2=110

UPPER LIMIT +LOWER LIMIT/2

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Step-by-step explanation:

Answer 2

class mark = upper limit + lower limit divide by 2

class mark = 130 + 90 / 2

220/2

= 110

hope you get it