Question

Ravi got 60% in English and 46% in Biology and the maximum marks of both papers are 100. What percent does he score in maths, if scores 50% marks in all the three subjects? Maximum marks of maths paper are 200.

1. 47% 
2. 30%
3. 54%
4. 40%
5. None of these

Answer 1

Correct Answer - Option 1 : 47% 

Given 

Marks scored in English = 60%

Marks scored in Biology = 46%

Maximum marks of both papers = 100

Calculation

Let Ravi scores x% in maths.

Now, 60 + 46 + x = 50% of all three subjects

⇒ 106 + x = 50% of 400

⇒ 106 + x = (50/100) × 400 = 200 

⇒ x = 200 – 106 = 94

⇒ x% = (94/200) x 100 = 47%

∴  Ravi scores 47% in maths.