A student required 20% marks to pass in psychology. He/she secured 10% marks and failed by 20 marks. What is the passing marks?

Correct option is A

Given:
· Required marks to pass = 20%
· Marks secured = 10%
· Failed by 20 marks
Concept Used:
· The difference between the passing percentage and the percentage obtained gives the percentage that equals 20 marks.
· We can use this information to find the total marks and then calculate the passing marks.
Solution:
1. The student failed by 10% (20% - 10%), which corresponds to 20 marks.
2. Therefore, 10% of the total marks = 20 marks.
3. If 10% equals 20 marks, then: Total marks = 20 × 10 = 200.
4. The passing marks are 20% of 200: Passing marks = 20% of 200 = 0.20 × 200 = 40 marks.
Final Answer: (a) 40