A 20L mixture of milk water is in the ratio 5:3. If 4L of this mixture is to be replaced by 4L of milk, the ratio of milk to water in the new mixture would be

6 : 5

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7 : 3

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3 : 7

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Solution

The correct option is B
7 : 3

$Q u a n t i t y o f m i l k i n a m i x = (16 \times \frac{5}{8}) = 10 l i t r e s . Q u a n t i t y o f m i l k i n 20 l i t r e s o f n e w m i x = (10 + 4) = 14 l i t r e s . Q u a n t i t y o f w a t e r i n i t (20 - - 14) = 6 l i t r e s . R a t i o o f m i l k a n d w a t e r i n t h e n e w r a t i o m i x i s = 14 : 6 = 7 : 3$

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A 20L mixture of milk water is in the ratio 5:3. If 4L of this mixture is to be replaced by 4L of milk, the ratio of milk to water in the new mixture would be

The correct option is B 7 : 3 Quantity of milk in a mix=(16 × 58)=10litres.Quantity of milk in20litresof new mix=(10+4)=14litres.Quantity of water in it(20−−14)=6litres.Ratio of milk and water in the new ratio mix is=14:6=7:3