Subject: mathqa
Question: company a imported 12,000 widgets made of either brass or aluminum . the widgets are painted blue , red or green . if 10 percent of the widgets are made of brass and of those 20 percent are painted green and 40 percent are painted red how many brass widgets painted blue were imported ?
Option: 
A: 1680
B: 1050
C: 420
D: 480
Answer: D