John has scored 60% in statistics and 70% in mathematics. A weightage of 2 is given to statistics and a weightage of 4 is given to mathematics. Which of the following expressions represents the weighted average of the two scores?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e (2 × 60% + 4 × 70%)/(2 + 4).
The weighted average is calculated as:
(weightage of statistics × score in statistics + weightage of mathematics × score in mathematics) / (total weightage)
So, the expression for the weighted average = (2 × 60% + 4 × 70%)/(2 + 4)