The average marks scored by a student in 4 subjects is 75. But when the marks of English are added to it, the overall average became 70. How much did he score in English?
Answer & explanation
Correct answer: option 1
Sum of marks in 4 subjects = 4 × 75 = 300
After adding english marks ,
New sum of 5 subjects = 5 × 70 = 350
English marks = 350 - 300 = 50