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In what proportion should milk and water be mixed to reduce the price of milk from Rs.18 per litre to Rs.16 per litre?

(a) 8:1  (b) 10:1

(c) 6:1  (d) None of these

1 Answer

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Assuming water is free of cost,

$$\frac{x.18+ y.0}{x+y} = 16 \\ \implies 2x = 16y \\ \implies x:y = 8:1$$
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