# In one alloy there is 12% chromium while in another alloy it is 8%. 20 kg of the first alloy was ...

In one alloy there is 12% chromium while in another alloy it is 8%. 20 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.

## Answer/Solution

9.45%

### Steps/Work

The amount of chromium in the new 20+35=55 kg alloy is 0.12*20+0.08*35=5.2 kg, so the percentage is 5.2/55*100=9.2%.

Answer: A.

Answer: A.