Answer: (b) 37.6
Let say There were 100S students
Absent = (25/100)100S = 25S
Score by 25S students = 0 ( as absent)
30% failed by 20 marks
so marks received by them = 33 - 20 = 13
30% Students = (30/100)100S = 30S
Score by 30S Students = 30S * 13 = 390S
10% Students = 10S
Just passed because of grace Mark = 5
so their score = 33 ( final score to be counted)
Score by 10S Students = 10S * 33 = 330S
Remaining Students = 100S - 25S - 30S - 10S = 35S
Average of remaining = 60
Score by remaining 35S Students = 35S * 60 - 2100S
Total Score = 0 + 390S + 330S + 2100S = 2820 S
Average = 2820S/100S = 28.2
Average of Appeared students = 2820S/75S = 37.6