Pens Blue
Saturday, June 11th, 2011if you have 3 red pens, 4 blue and 5 black how do I work out probability of taking black pen out of box and t?
and then probability of not being black pen i'm really stuck
5/12
7/12
if you have 3 red pens, 4 blue and 5 black how do I work out probability of taking black pen out of box and t?
and then probability of not being black pen i'm really stuck
5/12
7/12
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