The following table shows the marks obtained by two students Raj and Ramesh in different subjects.

Subjects	Raj	Max-marks	Ramesh	Max-marks
Mathematics	18	20	85	100
Physics	17	20	70	100
Chemistry	16	20	60	100
Biology	15	20	75	100

What is the difference between Raj and Ramesh's percentage of aggregate marks?

Correct option is A

Given:

Marks obtained and maximum marks in 4 subjects for Raj and Ramesh.

Formula Used:

Percentage = $$\left( \frac{\text{Total Marks}}{\text{Total Max Marks}} \right) \times 100$$​

Solution:

Raj:
Total marks = 18 + 17 + 16 + 15 = 66
Total max marks = 20 × 4= 80
Percentage =$$\frac{66}{80} \times 100 = 82.5\%$$​​

Ramesh:
Total marks = 85 + 70 + 60 + 75 = 290
Total max marks = 100 × 4 = 400
Percentage =$$\frac{290}{400} \times 100 = 72.5\%$$​​

Difference = 82.5% − 72.5% = 10%