By weight, liquid X makes up 2 percent of solution P and 7.5 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?
Choose the most appropriate option.
A) 4.5%
B) 4.7%
C) 4.9%
D) 5.1%
E) 5.3%
The number of grams of liquid X is 2(400)/100 + 7.5(600)/100 = 8 + 45= 
<gadget id="calculator">8 + 45</gadget>
<output>53</output>
53 grams.   53 / 1000= 5.3%   The answer is 5.3%.
<result>E</result>
By weight, liquid X makes up 2 percent of solution P and 7.5 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?