Question

(1).the class-mark of the class 130-150 is:

(a).130
(b). 135
(c). 140
(d). 145

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Answer 1

Answer:

Class mark= (130+150) /2= 280/2= 140

Answer:- c) 140

Answer 2

Answer:

Step-by-step explanation:

The class mark of the class 130-150 are :

Mean difference: 280 / 2 = 140.

Mid-point of it as class mark : 140.