Anil K. answered • 03/31/19

Experienced Test Prep Tutor

Its easier if you find the total marks. Supposing total marks as M, two equations that you should equate are:

**30% of M + 30 = Pass **

**42% of M = Pass + 42 ** which equates to **42% of M -42 = Pass**

Now equating two Pass equation you get, **30% of M + 30 = 42% of M - 42.**

You can solve for M which gives you 600. So total marks was 600. Passing marks was 210.

Student 1 got 30% of 600, meaning 180 so failed by 30 marks.

Student 2 got 42% of 600, meaning 252 so got 42 points more than needed to pass.