By weight, liquid X makes up 1.5 percent of solution P and 6.5 percent of solution Q. If 400 grams of solution P are mixed with 600 grams of solution Q, then liquid X accounts for what percent of the weight of the resulting solution? Pick one
A) 3.6% B) 3.9% C) 4.2% D) 4.5% E) 4.8%
The number of grams of liquid X is 1.5(400)/100 + 6.5(600)/100 = 6 + 39= 
<gadget id="calculator">6 + 39</gadget>
<output>45</output>
45 grams.   45 / 1000= 4.5%   The answer is 4.5%.
<result>D</result>
By weight, liquid X makes up 1.5 percent of solution P and 6.5 percent of solution Q. If 400 grams of solution P are mixed with 600 grams of solution Q, then liquid X accounts for what percent of the weight of the resulting solution?