question_answer

In an examination, a candidate scores the following percentage of marks. English?44; Hindi?58; Maths?74; Physics?61 Chemistry ? 62. If weights 2, 4, 4, 5, 3 respectively are allotted to these subjects, then the candidate's weighted mean percentage is

A)  61                              

B)  61.5

C)  62                              

D)  62.5

Correct Answer: B

Solution :

    \[\text{Mean}=\frac{\sum{{{f}_{i}}{{x}_{i}}}}{{{\sum{f}}_{i}}}=\frac{1107}{18}=61.5\]