GIVEN: Rajvir scores 20% marks in an examination and fails by 50 marks, Rajvir scores 50% marks and passes by 40 marks CONCEPT: Basic percentage concept FORMULA USED: X% of Y = (Y) × X/100 CALCULATION: We know the passing marks will be same for both the students. Let maximum marks of the examination be x Then, 20/100 × x + 50 = 50/100 × x – 40 ⇒ 30/100 × x = 90 ⇒ x = 300 Hence, Maximum marks of the examination = 300