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A bag contains 3 red, 2 blue, and 7 white marbles. If a marb
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sandy
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GRE 1: Q167 V156
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A bag contains 3 red, 2 blue, and 7 white marbles. If a marb [#permalink] New post  05 Aug 2018, 14:25
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A bag contains 3 red, 2 blue, and 7 white marbles. If a marble is randomly chosen from the bag, what is the probability that it is not blue?

Give your answer as a fraction.

Show: :: OA
\(\frac{5}{6}\)

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sandy
Retired Moderator
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Posts: 4804
GRE 1: Q167 V156
WE:Business Development (Energy and Utilities)
Re: A bag contains 3 red, 2 blue, and 7 white marbles. If a marb [#permalink] New post  07 Aug 2018, 06:14
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Explanation

In the bag of marbles, there are 3 red marbles and 7 white marbles, for a total of 10 marbles that are not blue. There are a total of 3 + 7 + 2 = 12 marbles in the bag.

Since probability is defined as the number of desired items divided by the total number of choices, the probability that the marble chosen is not blue is \(\frac{10}{12}=\frac{5}{6}\).
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Re: A bag contains 3 red, 2 blue, and 7 white marbles. If a marb [#permalink] New post  04 Oct 2019, 14:34
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