A bag contains 5 yellow marbles, 7 pink marbles, and 3 purple marbles. Gordon selects a marble without looking. What is the probability that he selects a yellow marble or a purple marble? Give your answer as a fraction in simplest form.
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Answer:
Probability is desired outcomes divided by total outcomes, so long as all outcomes are equally likely.
You want blue, there a re three blue marbles, so desired outcomes = 3.
There are 3 blue + 7 red + 5 yellow = 15 total
3/15 = 1/5 = 20%
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Answer:
yellow 1/3
purple 1/5
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