a bag contains 4 red marbles, 5 blue marbles, 1 black marble and 3 yellow marbles. if a marble is drawn at random, find the prob. of not drawing a red marble
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You have 4 red marbles and 13 marbles in total. Thus, your chance of drawing a red marble is 4/13 and your chance of NOT drawing a red marble is 9/13.
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