Question

12 l are drawn out from 35 l of a 5 : 7 milk and water solution. What is the ratio of milk and water in the remaining solution? (a) 7 : 5 (b) 25 : 12 (c) 12 : 25 (d) 5 : 7

Answer 1

Note average of can 1 and 2 is sum/total = (75+50)/2= 62.5

I can milk               II can milk
75                        50
                62.5
(50-62.5              (75-62.5
=12.5)                 =12.5)

mix in 2nd can : mix in 1st can = 12.5 : 12.5 = 1:1


ie, from each can, 1/2 × 12 = 6 litre should be taken