An alloy weighing 24 ounces is 70 percent gold. How many ounces of pure gold must be added to create an alloy that is 90 percent gold?
Choose the correct choice.
A) 6	B) 9	C) 12	D) 24	E) 48
In 24 ounces, gold is 24 * (70/100)= 
<gadget id="calculator">24 * (70/100)</gadget>
<output>84/5 = around 16.8</output>
16.8 ounces. Now we add x ounces of pure gold to make it 90% gold.   So 16.8 + x= (24 + x)* 90/100 =&gt; x =48.   Answer is 48.
<result>E</result>
An alloy weighing 24 ounces is 70 percent gold. How many ounces of pure gold must be added to create an alloy that is 90 percent gold?