The following bar diagram shows the number of students who opted for the different subjects in the year 2020 and 2021.

What is the sum of the total number of students who opted for different subjects in 2020 and only Geography in 2021?

510

Total number of students in 2020 with geography in 2021 = 75 + 100 + 60 + 125 + 75 + 75 = 510