Let the person's original salary be 100 Salary reduced by 20 %, new salary = 80 Rs. To bring back the difference ie., 20Rs, the salary should be increased by (20/80) x 100 = 25 %
If Vijay had 15 marks, more he could have secured 40% marks. Now, 15 marks more than 185 = 185 + 15 = 200 Let the maximum marks be k, then 40 % of m = 200 40/100 x m = 200 m=500, thus the maximum mark is 500
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