In an examination in which full marks were 800, A gets 20% more than B, B gets 20%more than C, and C get 15% less than D. If A got 576, what percentage of full marks did D get (approximately)?
A = `120/100 B, B= 120/100 C and C= 85/100 D`
`:.` B= `5/6 A, C= 5/6 B and D = 20/17 C`
B= `5/6 xx 576 = 480; C = 5/6 xx 480 = 400; D= 20/17 xx 400 = 8000/17`
so ,Required percentage = `(8000/17 xx 1/800 xx 100)`% = 58.82%.
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