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 total of all the scores is (10 × 40) + (12 × 50) + (8 × 60) = 400 + 600 + 480 = 1480.
Dividing by the 30 students gives a mean of 1480/30 = 49.33.