Question

In what ratio should the 2 mixtures of milk containing milk and water in ratios 5: 7 and 11: 6 should be mixed so that the resulting mixture has an equal amount of milk and water?

• A. 30: 17
• B. 11: 25
• C. 34: 55
• D. 13: 47

Answer 1

The correct option is A 30: 17

Track the proportion of milk or water w.r.t to the entire mixture

$\left(\frac{1}{2}\right)-\left(\frac{5}{12}\right)=\frac{1}{12}$
$\left(\frac{11}{17}\right)-\left(\frac{1}{2}\right)=\frac{5}{34}$
By simplifying the ratio $\left(\frac{5}{34}\right):\left(\frac{1}{12}\right)$
We get the ratio $=60:34$
Which is the same as $30:17$