Question

In an examination, there are 3 papers of Mathematics of 100 marks each. A boy secures 60% in the first paper and 70% in the second paper. In order to secure 70% in the aggregate the percentage of marks he should secure in third paper will be:

• A.
  90%
• B. 80%
• C. 75%
• D. 70%

Answer 1

The correct option is B 80%

$60+70+x=\frac{70}{100}\times 300$

​​​​​​​$orx=80\%$