Question

13. The average marks of a student in Maths and English is 75. His average of marks in Maths and Science is 60. What is the difference between the marks which he obtained in English and Science?

Answer 1

Explanation:

Let the math marks be ( a)

science (b)

English (c

(a+c)/2=75. , a+c=75*2

a+c=150

a+b=120

a+c-(a+b) =159-120

c-b=30

: the difference between marks scored in English and science is 30