In one alloy there is 12% chromium while in another alloy it is 10%. 15 kg of the first alloy was melted together with 35 kg of the second one to form a third alloy. Find the percentage of chromium in the new alloy.
Select: A) 8.8% B) 9% C) 9.2% D) 8.6% E) 10.6%
The amount of chromium in the new 15+35= 
<gadget id="calculator">15+35</gadget>
<output>50</output>
50 kg alloy is  0.12*15+0.10*35= 
<gadget id="calculator"> 0.12*15+0.10*35</gadget>
<output>5.3</output>
5.3 kg, so the percentage is  5.3/50*100= 
<gadget id="calculator"> 5.3/50*100</gadget>
<output>10.6</output>
10.6%.   Answer: 10.6%.
<result>E</result>
In one alloy there is 12% chromium while in another alloy it is 10%. 15 kg of the first alloy was melted together with 35 kg of the second one to form a third alloy. Find the percentage of chromium in the new alloy.