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A box contains 25 red blacks, 100 blue blocks, and 175 yellow blocks.

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Manager
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Joined: 09 Jun 2010
Posts: 78
A box contains 25 red blacks, 100 blue blocks, and 175 yellow blocks. [#permalink]

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New post 19 Jul 2010, 03:07
00:00
A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

95% (01:15) correct 5% (00:00) wrong based on 50 sessions

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A box contains 25 red blacks, 100 blue blocks, and 175 yellow blocks. What is the probability that a block picked at random from the box will be red ?

1/25
1/12
1/7
1/5
1/3
[Reveal] Spoiler: OA
Manager
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Joined: 03 Jun 2010
Posts: 181
Location: United States (MI)
Concentration: Marketing, General Management
WE: Business Development (Consumer Products)
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Re: A box contains 25 red blacks, 100 blue blocks, and 175 yellow blocks. [#permalink]

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New post 19 Jul 2010, 03:40
There are 25 reds out of 300 blocks.

25/300 = 1/12 (B)
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Joined: 05 Jul 2010
Posts: 26
Re: A box contains 25 red blacks, 100 blue blocks, and 175 yellow blocks. [#permalink]

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New post 19 Jul 2010, 04:33
You're right. It would be B.
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Re: A box contains 25 red blacks, 100 blue blocks, and 175 yellow blocks.   [#permalink] 19 Jul 2010, 04:33
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A box contains 25 red blacks, 100 blue blocks, and 175 yellow blocks.

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