A gets 40% marks in an exam and he received 40 less marks than passing marks. B gets 70% marks in same exam and received 20 more marks than passing marks. If C gets 65% marks in the same exam, then find the difference between marks received by A and C in the exam.

Correct option is E

Let highest marks of the exam = 100x
40% of 100x +40=70% of 100x-20
30x = 60
x = 2
Total marks get by C = 65% of 200=130
Required difference = 130 – 40% of 200 =50