Question

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

Answer 1

(b) 110

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