Sally needs 50% to pass. If she gets 480 marks and fails by 20 marks. What were the max marks she could have?

1000

Step-by-step explanation:

If the total score is T and she needs 50% to pass, it means that the pass mark

= 50% * T

= 0.5T

If she fails by 20 marks, it means that her score is the difference between the pass mark and 20

= 0.5T - 20

Given that she gets 480 marks then

0.5T - 20 = 480

0.5T = 500

T = 500/0.5

= 1000

The maximum marks she could have is 1000