Question

Mixture of milk and water has been kept in two containers ratio of milk to water in one of the containers is $5:1$ and that in the other container is $7:2.$
In what ratio the mixtures of these two containers should be added together so that quantity of milk in the new mixture may become $80\%$ ?

• A. $3:2$
• B. $2:3$
• C. $4:5$
• D. None of these

Answer 1

The correct option is C $4:5$

Milk concentration in first container = 5/6
Milk concentration is second container = 7/9
Milk concentration in final container = 80% = 80/100 = 4/5.
Now, using allegation,