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# A certain jar has 3 red marbles, 5 black marbles, and 7 white marbles.

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Math Expert
Joined: 02 Sep 2009
Posts: 53066
A certain jar has 3 red marbles, 5 black marbles, and 7 white marbles.  [#permalink]

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18 Jan 2019, 00:05
00:00

Difficulty:

15% (low)

Question Stats:

94% (00:28) correct 6% (01:10) wrong based on 19 sessions

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A certain jar has 3 red marbles, 5 black marbles, and 7 white marbles. If a marble is to be selected at random from the jar, what is the probability that a black marble will be selected?

A 1/5
B 1/3
C 7/15
D 8/15
E 4/5

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Joined: 18 Aug 2017
Posts: 1928
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Concentration: Sustainability, Marketing
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WE: Marketing (Energy and Utilities)
Re: A certain jar has 3 red marbles, 5 black marbles, and 7 white marbles.  [#permalink]

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18 Jan 2019, 06:41
Bunuel wrote:
A certain jar has 3 red marbles, 5 black marbles, and 7 white marbles. If a marble is to be selected at random from the jar, what is the probability that a black marble will be selected?

A 1/5
B 1/3
C 7/15
D 8/15
E 4/5

total : 15
black marble P ; 5/15; 1/3
IMO B
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Re: A certain jar has 3 red marbles, 5 black marbles, and 7 white marbles.   [#permalink] 18 Jan 2019, 06:41
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