question_answer

In one glass, milk and water are mixed in the ratio 3 : 5 and in another glass they are mixed in the ratio 6 : 1. In what ratio should the contents of the two glasses be mixed together so that the new mixture contains milk and water in the ratio 1 : 1?

A)  20 : 7              

B)  8 : 3

C)  27 : 4  

D)  25 : 9

Correct Answer: C

Solution :

In glass I Milk \[=\frac{3}{8},\] water \[=\frac{5}{8}\] In glass II,             Milk \[=\frac{6}{7},\] water \[\frac{1}{7}\] By Alligation's rule,             \[\therefore \] Required ratio \[=\frac{5}{14}:\frac{1}{8}=20:7\]