Out of the 75 students enrolled in the Economics class, 12% did not qualify to take the final examination on account of lack of attendance. Of those who qualified to take the test, 9.09% absented themselves from the exam. Two-third of those who took the exam passed the examination. 75% of those who passed secured a first class in the paper. How many students who pass the exam scored less than first class?
None of these
Number of students who passed the exam but scored less than 1st class =