UP Police SI Exam 12 Dec 2017 Shift 1 Solved Paper

Thiyagu gets an average of 50% marks in 5 subjects and those marks are in the ratio of 12 ∶ 8 ∶ 6 ∶ 4 ∶ 2. If the passing mark is 60% of the maximum marks and each subject has the same maximum marks, in how many subjects he failed in the examination?