A vessel contains 20 liters of a mixture of milk and water in the ratio 3:2. 10 liters of the mixture are removed and replaced with an equal quantity of pure milk. If the process is repeated once more, find the ratio of milk and water in the final mixture obtained ?

Options

A. a. 1:4
B. b. 4:1
C. c. 9:1
D. d. 5:3

Answer

D

Explanation

let population of city r in 2014, 2015 and 2016 be (x+2n) ,(x+n) and x respectively
So, `(50)/(100)(x+n)=(70)/(100)(x)`
5x+5n=7x
2x=5n
`n=(2)/(5)x`
Required percentage `=(x+2n-x)/(x+2n)xx100`
`=(2xx(2)/(5)x)/((9)/(5)x) xx 100=44 (4)/(9) %`