The following table shows the marks obtained by two students in different subjects:

Correct Option

To determine the difference in the mean aggregate percentage marks, the total marks obtained and the total maximum marks for each student must first be calculated.

For Student A:

• Total marks obtained = 60 (English) + 70 (Psychology) + 50 (History) + 30 (Sanskrit) = 210
• Total maximum marks = 100 (English) + 100 (Psychology) + 100 (History) + 50 (Sanskrit) = 350
• Aggregate percentage for Student A = $\frac{210}{350}\times 100$ = 60%

For Student B:

• Total marks obtained = 80 (English) + 70 (Psychology) + 60 (History) + 15 (Sanskrit) = 225
• Total maximum marks = 150 (English) + 100 (Psychology) + 100 (History) + 25 (Sanskrit) = 375
• Aggregate percentage for Student B = $\frac{225}{375}\times 100$ = 60%

The difference in the mean aggregate percentage marks of the students is:

• Difference = Percentage of Student A - Percentage of Student B = 60% - 60% = 0%

Therefore, the difference is Zero.

Incorrect Options

Options 1 (2.5%), 2 (13.75%), and 3 (1.25%) are incorrect because the calculated aggregate percentage for both Student A and Student B is 60%. The difference between these two percentages is 0%, not any of the values provided in these options.