Question

in an examination a condidate got 30 % marks of tatal mark and failed by 20 marks while another secured 50 % marks and got 30 marks more than pass marks . what is the pass marks ???

Answer 1

let passing marks =x
atq
30%ofx+20=50%ofx-30
30/100*x+20=50/100*x-30
3/10x+20=x/2-30
3/10x-x/2=-30-20
(3x-10x)/10=-50
-7x/10=-50
-7x=-500
x=500/7