Question

what is the class mark of the class interval 70-75

Answer 1

Step-by-step explanation:

Therefore 75 is the class mark of interval. Therefore 75 is the class mark of interval.

Answer 2

75

Step-by-step explanation:

ADD 70 AND 75 which are upper and lower limits respectively

as class mark = (upper limit+lower limit) /2

so,

(70+75)/2 = 145 /2 = 75

I hope you understood