A can of water and milk mixture contains 60% milk. A part of this mixture is replaced by another mixture containing 50% milk and the percentage of milk was found to be 52%. The quantity of mixture replaced is:
1
\(1 \over 5\)
2
\(3 \over 5\)
3
\(4 \over 5\)
4
\(2 \over 5\)