A class of 40 students took a mathematics test. 18 students had an average score of 75. The other students had an average score of 62. What is the average score of the entire class?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 67.85.
Total students = 40
Average of Group 1: 18 × 75 = 1350
Average of Group 2: 22 × 62 = 1364
Average score of the entire class = = = 67.85