Total number of students passed in annual exams in a section = [ (No. of students failed in half-yearly but passed in annual exams)         + (No. of students passed in both exams)    ] in that section Success rate in annual exams in Section A     = No. of students of Section A passed in annual exams x 100 % Total number of students in Section A     = (14 + 64) x 100 % (28 + 14 + 6 + 64)     = 78 x 100 % 112     = 69.64%. Similarly, success rate in annual exams in: Section B (12 + 55) x 100 % = 67 x 100 % = 62.62%. (23 + 12 + 17 + 55) 107 Section C (8 + 46) x 100 % = 54 x 100 % = 67.5%. (17 + 8 + 9 + 46) 80 Section D (13 + 76) x 100 % = 89 x 100 % = 67.94%. (27 + 13 + 15 + 76) 131 Clearly, the success rate in annual examination is maximum for Section A.