A mixture of 150 liters of wine and water contains 15% water. How much more water should be added so that water becomes 25% of the new mixture? Options:
A) 10
B) 30
C) 20
D) 15
E) 17
Number of liters of water in150 liters of the mixture = 15% of 150 = 15/100 * 150= 
<gadget id="calculator">15/100 * 150</gadget>
<output>45/2 = around 22.5</output>
22.5 liters.   P liters of water added to the mixture to make water 25% of the new mixture.   Total amount of water becomes (22.5 + P) and total volume of mixture is (150 + P).   (22.5 + P)= 25/100 * (150 + P)   90+4P = 150+P   P = 20 liters.   Answer: 20
<result>C</result>
A mixture of 150 liters of wine and water contains 15% water. How much more water should be added so that water becomes 25% of the new mixture?