In a class, there are 30 boys and 20 girls. The average score of boys in Physics is 92, whereas the average score of girls in Physics is 83. Find the average score of the whole class in Physics.
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 88.4 .
Boys = 30, Average = 92 → Total = 30 × 92 = 2760
Girls = 20, Average = 83 → Total = 20 × 83 = 1660
Total students = 30 + 20 = 50
Total score = 2760 + 1660 = 4420
Average score of whole class = 4420 ÷ 50 = 88.4