The class mark of the class 100−120 is
Question:

The class mark of the class 100−120 is
(a) 100
(b) 110
(c) 115
(d) 120

 

Solution:

(b) 110

Class mark $=\frac{\text { Upper limit+Lower limit }}{2}=\frac{120+100}{2}=110$

 

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