What is the ratio of low-quality dye used for C-type shirts to that used for D- type shirts?
Answer: B
Amount of low quality die used for C-type shirts = (40% of 30000) = 12,000 units.
Amount of low quality die used for D-type shirts = (60% of 10000) = 6,000 units.
Hence, required ratio = = 2 : 1.