Question 779237
Max marks = 120 + 150 + 180 = 450


Let us assume that Susant scored x marks in Mathematics.
Total marks scored = 72 + 70 + x


Percentage of marks scored by Susant = {{{(142+x)*100/450=2(142+x)/9}}}
But this percentage is given to be as 60.


So, {{{60=2(142+x)/9}}}
{{{270=142+x}}}
{{{x=128}}}