Question

# In what ratio is water to be mixed with milk at Rs. 9.60 per litre to make the price of the mixture Rs. 9 per litre?

A

15:2

B

15:4

C

15:1

D

15:3

Solution

## The correct option is B 15:1 Assume that cost of water is 0 Let quantity of water be y litre. and quantity of milk be x litre. ∴ Quantity of mixture will be (x+y) litre and the given cost of the mixture Rs. 9 per litre. Now, 9.6x=9(x+y) 9.6x=9x+9y 9.6x-9x=9y 0.6x=9y xy=90.6=906=15 Quantitative Aptitude

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