In an English exam of 50 marks of a class, 20 students had an average score of 40 marks, 25 students had an average score of 34 marks and 15 students had an average score of 26 marks. What is the weighted average score of the entire class?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2 i.e. 34.
Total marks of 20 students = 20 × 40 = 800
Total marks of 25 students = 25 × 34 = 850
Total marks of 15 students = 15 × 26 = 390
Total marks = 800 + 850 + 390 = 2040
Total students = 20 + 25 + 15 = 60
Weighted average = 2040 ÷ 60 = 34