Some students of a class appeared in an examination. There average score remained 52. If average score of the top 20% of them was 80 and that of the bottom 20% was 30, then find the average score of the remaining students.
Answer & explanation
Correct answer: option 2
Let the total students = 100%
If the average score is 52 then the total score will be = 5200
According to the question,
If average score of the top 20% of them was 80
Total score of 20% = 1600
If average score of the bottom 20% of them was 30
Total student of bottom 20% = 600
Now total score of remaining 60% = 5200 - 1600 - 600 = 3000
Average score of remaining = 3000/60 = 50