The amount of water (in ml) that should be added to reduce 15 ml. Lotion, containing 50% alcohol, to a lotion containing 30% alcohol, is?
Choose the correct answer:	A) 8 ml	B) 5 ml	C) 4 ml	D) 6 ml	E) 10 ml
7.5 7.5   30% 70%   30% ----- 7.5   70% ------? =&gt; 17.5 - 7.5= 
<gadget id="calculator">17.5 - 7.5</gadget>
<output>10</output>
10 ml   Answer:10 ml
<result>E</result>
The amount of water (in ml) that should be added to reduce 15 ml. Lotion, containing 50% alcohol, to a lotion containing 30% alcohol, is?