Question

A goldsmith mixes 10oz of a 35% gold alloy with 20oz of a 17% gold alloy. What is the percent concentration of the resulting alloy?

Answer 1

Given:

A goldsmith mixes 10oz of a 35% gold alloy with 20oz of a 17% gold alloy

So, the weight of the new alloy = 10 + 20 = 30 oz

The percent concentration will be as follows:

`(10*35+20*17)/(30)=(350+340)/(30)=(690)/(30)=23\%`

So, the answer will be:

the percent concentration of the resulting alloy = 23%