• # question_answer 3850 students appeared for an exam out of which 18% failed. What is the respective ratio between the number of students who passed to the number of students who failed? A)  41 : 9                           B)  43 : 9 C)  47 : 9                D)    41 : 7

Required ratio $=(100-18):18$ $=82:18=41:9$