Question

A student scored an average of 80 marks in 3 subjects. Hindi, English and Maths. If the average marks in Hindi and Math are 90 and that in Hindi and English is 70. What are the marks in Hindi?
1. 21
2. 80
3. 36
4. 45
5. None

Answer 1

Correct Answer - Option 2 : 80

Given:

Average marks in three subjects = 80

Average marks in math and Hindi = 90

Average marks in Hindi and English = 70

Formula used:

Total marks = Average marks × Number of subjects

Calculation:

Total marks in all three subjects = 80 × 3

⇒ 240

Total marks in math and Hindi = 90 × 2

⇒ 180

Total marks in Hindi and English = 70 × 2

⇒ 140

Total marks in Maths + Hindi and Hindi + English = 180 + 140

⇒ 320

Marks in Hindi = 320 – 240

⇒ 80 marks

∴ The marks in Hindi is 80