Subject: mathqa
Question: company a imported 10,500 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 red and 40 percent are painted blue how many brass widgets painted green were imported ?
Option: 
A: 480
B: 2100
C: 1050
D: 420
Answer: D