(a) Number of students scored marks below 40 i.e., 30-39 ate 4 . 4 students have failed.
(b) Number of students got marks from 50 to 59 is 7 and number of students got marks from 60 to 69 is 11.
∴ 7 + 11 = 18 students got marks from 50 to 69.
(c) 4 students scored marks from 90 and above.
(d) Number of students got marks from 80 to 89 is 6. Number of students got marks from 90 to 92 is 4.
∴ 6 + 4 = 10 students are merit holders.
(e) Total number of students in the class = 4 + 2 +7 + 11 + 8 + 6 + 4 = 42