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A bag contains 3 red, 2 blue, and 7 white marbles. If a marb

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GRE Prep Club Legend
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Joined: 07 Jun 2014
Posts: 4856
GRE 1: Q167 V156
WE: Business Development (Energy and Utilities)
Followers: 102

Kudos [?]: 1742 [0], given: 397

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.

[Reveal] Spoiler: OA
\(\frac{5}{6}\)

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Sandy
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GRE Prep Club Legend
GRE Prep Club Legend
User avatar
Joined: 07 Jun 2014
Posts: 4856
GRE 1: Q167 V156
WE: Business Development (Energy and Utilities)
Followers: 102

Kudos [?]: 1742 [0], given: 397

Re: A bag contains 3 red, 2 blue, and 7 white marbles. If a marb [#permalink] New post 07 Aug 2018, 06:14
Expert's post
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 \(\frac{10}{12}=\frac{5}{6}\).
_________________

Sandy
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Re: A bag contains 3 red, 2 blue, and 7 white marbles. If a marb   [#permalink] 07 Aug 2018, 06:14
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