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OpenStudy (anonymous):
A bag contains 7 red marbles, 12 orange marbles, 18 yellow marbles, and 5 purple marbles. A marble is drawn at random from the bag. What is the probability that the marble drawn will not be orange? A.1/30 B.2/7 C.5/7 D.1/12
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OpenStudy (igreen):
Okay, how many total marbles are there?
OpenStudy (igreen):
Count again
OpenStudy (anonymous):
42
OpenStudy (igreen):
Yes, and how many orange marbles are there?
OpenStudy (anonymous):
12
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OpenStudy (igreen):
Yes, what's 42 - 12?
OpenStudy (anonymous):
30
OpenStudy (igreen):
Yes, so the probability that you will not choose an orange marble is 30/42..or if you want to simplify it 5/7.
OpenStudy (anonymous):
thx
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