UPSC CAPF Assistant Commandant Model Paper 4

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