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At an examination in which maximum marks are 500. P got 10% less than Q, Q got 25% more than R and R got 20% less than S. If P got 360 marks what percentage of marks was obtained by S ?

Correct Answer: 80

Explanation:

Let marks obtained by S = M


R's marks = 0.80M


Q's marks = 1.25 (0.80M)


P's marks = (0.90) (1.25) (0.80M)


= 0.9M


But 0.9M = 360


M = ?


M = 400


Hence % of marks obtained by S


= 400/500 x 100 = 80%.


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