In an examination, A got 10% marks less than B, B got 25% marks more than C, C got 20% marks less than D. If A got 360 marks out of 500, the percentage of marks obtained by D was
70
75
80
85
A
85
B
70
C
75
D
80
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Solution
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Let D's mark be x. So, C = 0.8x, B = 1.25×(0.8x)=x, A=0.9x A has got 360500. So, 0.9x=360×100500 or x=80. D has obtained 80 marks.
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