In a class of 30 students, 10 scored 40, 12 scored 50, 8 scored 60. The mean score is:
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → 49.33
The mean is the total of all the scores divided by the number of students. When several students have the same score, the score is multiplied by the number of students who got it.
Total of all 30 scores: \(10\times40+12\times50+8\times60=400+600+480=1480\)
Mean score, the total shared among 30 students: \(\displaystyle\frac{1480}{30}=49.33\)