In one alloy there is 12% chromium while in another alloy it is 8%. 35 kg of the first alloy was melted together with 40 kg of the second one to form a third alloy. Find the percentage of chromium in the new alloy.	Choose the correct choice.
A) 8.8% B) 9.75% C) 9.2% D) 8.6% E) 8.4%
The amount of chromium in the new 35+45= 
<gadget id="calculator">35+45</gadget>
<output>80</output>
80 kg alloy is  0.12*35+0.08*45= 
<gadget id="calculator"> 0.12*35+0.08*45</gadget>
<output>7.8</output>
7.8 kg, so the percentage is  7.8/80*100= 
<gadget id="calculator"> 7.8/80*100</gadget>
<output>9.75</output>
9.75%.   Answer: 9.75%.
<result>B</result>
In one alloy there is 12% chromium while in another alloy it is 8%. 35 kg of the first alloy was melted together with 40 kg of the second one to form a third alloy. Find the percentage of chromium in the new alloy.