Question : The following table shows the marks (in percentages) obtained by six students in six different subjects in an examination. The maximum marks in each subject are 100.

Students	SUBJECT
	CS	PHYSICS	CHEMISTRY	MATHS	HISTORY	GEOGRAPHY
A	95	65	90	70	70	80
B	90	70	75	75	85	85
C	80	80	65	70	90	95
D	85	90	85	75	90	95
E	80	95	95	85	90	95
F	90	90	90	95	90	90

Answer the following question based on the table:
In which of the following subjects is the overall percentage the highest?

Option 1: Chemistry

Option 2: Geography

Option 3: History

Option 4: CS

Correct Answer: Geography

Solution : Given: Full marks = 100
Total subjects = 6
Total marks = 100 × 6 = 600
Marks obtained in CS = 95 + 90 + 80 + 85 + 80 + 90 = 520
Required percentage = $\frac{\text{marks obtained}}{\text{Total marks}}\times100$
= $\frac{520}{600}\times100=86.66$%
Marks obtained in Physics = 65 + 70 + 80 + 90 + 95 + 90 = 490
Required percentage = $\frac{\text{marks obtained}}{\text{Total marks}}\times100$
= $\frac{490}{600}\times100=81.66$%
Marks obtained in Chemistry = 90 + 75 + 65 + 85 + 95 + 90 = 500
Required percentage = $\frac{\text{marks obtained}}{\text{Total marks}}\times100$
= $\frac{500}{600}\times100=83.33$%
Marks obtained in Maths = 70 + 75 + 70 + 75 + 85 + 95 = 470
Required percentage = $\frac{\text{marks obtained}}{\text{Total marks}}\times100$
= $\frac{470}{600}\times100=78.33$%
Marks obtained in History = 70 + 85 + 90 + 90 + 90 + 90 = 515
Required percentage = $\frac{\text{marks obtained}}{\text{Total marks}}\times100$
= $\frac{515}{600}\times100=85.83$%
Marks obtained in Geography = 80 + 85 + 95 + 95 + 95 + 90 = 540
Required percentage = $\frac{\text{marks obtained}}{\text{Total marks}}\times100$
= $\frac{540}{600}\times100=90$%
The overall percentage is highest in geography.
Hence, the correct answer is Geography.