By weight, liquid X makes up 0.8 percent of solution A and 1.8 percent of solution B. If 400 grams of solution A are mixed with 700 grams of solution B, then liquid X accounts for what percent of the weight of the resulting solution?  Options:  A) 1.58%  B) 1.98%  C) 10%  D) 15%  E) 19%
I think there is a typo in question.   It should have been "By weight Liquid 'X ' makes up..... "   Weight of Liquid X = 0.8 % of Weight of 1.58% + 1.8% of Weight of B   When 400gms of 1.58% and 700gms of B is mixed :   Weight of Liquid X = (0.8 * 400)/100 + (1.8* 700)/100= 
<gadget id="calculator">(0.8 * 400)/100 + (1.8* 700)/100</gadget>
<output>15.8</output>
15.8gms   % of Liquid X in resultant mixture= (15.8/1000) *100= 
<gadget id="calculator">(15.8/1000) *100</gadget>
<output>1.58</output>
1.58%   1.58%
<result>A</result>
By weight, liquid X makes up 0.8 percent of solution A and 1.8 percent of solution B. If 400 grams of solution A are mixed with 700 grams of solution B, then liquid X accounts for what percent of the weight of the resulting solution?