A mixture of 150 liters of water and milk contains 20% milk. How much more milk should be added so that milk becomes 25% of the new mixture?  Choices.
A) 10	B) 20	C) 30	D) 40	E) 50
A   10 liters   Number of liters of milk in150 liters of the mixture = 20% of 150 = 20/100 * 150= 
<gadget id="calculator">20/100 * 150</gadget>
<output>30</output>
30 liters.   P liters of milk added to the mixture to make milk 25% of the new mixture.   Total amount of milk becomes (30 + P) and total volume of mixture is (150 + P).   (30 + P)= 25/100 * (150 + P)   120 + 4P = 150 + P =&gt; P = 10 liters.
<result>A</result>
A mixture of 150 liters of water and milk contains 20% milk. How much more milk should be added so that milk becomes 25% of the new mixture?