Posted by free on Sunday, May 13, 2012 at 6:41pm.
A box contains five blue, eight green, and three yellow marbles. If a marble is selected at random, what is the probability that it is not blue?

math  MathMate, Sunday, May 13, 2012 at 9:27pm
Total number of marbles = 5+8+3 = 16
Marbles which are not green = 5+3 = 8
P(not green) = 8/16 = 1/2