question_answer

A candidate obtained the following percentage of marks in an examination English 60, Maths 90, Physics 75, Chemistry 66. If weights 2, 4, 3,3 are allotted to these subjects respectively, then the weight mean is given by

A)  \[\frac{\text{6}0+\text{9}0+\text{75}+\text{66}}{\text{2}+\text{4}+\text{3}+\text{3}}\]

B)  \[\frac{\text{6}0\times \text{2}+\text{9}0\times \text{4}+\text{75}\times \text{3}+\text{66}\times \text{3}}{\text{2}+\text{4}+\text{3}+\text{3}}\]  

C) \[\frac{\text{6}0\times \text{2}+\text{9}0\times \text{4}+\text{75}\times \text{3}+\text{66}\times \text{3}}{4}\]

D)   \[\frac{\text{6}0+\text{9}0+\text{75}+\text{66}}{4}\]