Given that the student got 155 marks and still he failed by 10 marks
=> The minimum pass mark = 155 + 10 = 165
Given that minimum pass mark = 33% of the total mark
We're told that the minimum passing score is 33%, so 165 is equal to 33% of the maximum marks.
In other words:
165 =( 33÷100)x
x=(165×100)÷33
x=500 =maximum marks