In an exam, A gets 20% less than the passing marks and B gets 20% more than passing marks. If the sum of marks obtained by A and B is equal to maximum marks, what is the ratio of passing marks to maximum marks respectively?
Answer & explanation
Correct answer: option 4
Let passing marks = 100x
Marks scored by A = (100-20)% of 100x = 80% of 100x
= 80x
Marks scored by B = (100 + 20)% of 100x = 120% of 100x
= 120x
So , Total marks obtained by A and B = 120x + 80x = 200x
According to question ,
Total marks obtained by A and B = Maximum marks
So , Ration of Passing marks to Maximum marks is ,
100x : 200x
= 1 : 2