1. one of the boxes contained pens, 1 dozen red pens as a green butt butt 4 3 remaining blue probability, random, grab a pen and stylus pens 3 and all colors have an equal value?
1 a box containing one dozen pens, a red pen 3 pcs 4 pcs green left is blue, the probability that randomly picks 3 pen holder has full color equals how much.