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# probabilty, urgent help !

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Manager
Joined: 09 Jun 2010
Posts: 78
Followers: 1

Kudos [?]: 15 [0], given: 17

probabilty, urgent help ! [#permalink]

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19 Jul 2010, 03:07
00:00

Difficulty:

(N/A)

Question Stats:

90% (01:17) correct 10% (00:00) wrong based on 38 sessions

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A box contains 25 red blacks, 100 blue blocks, and 175 yellow blocks . What is the probabilty that a block picked at random from the box will be red ?
1/25
1/12
1/7
1/5
1/3

help me understand this
thanks
Manager
Joined: 03 Jun 2010
Posts: 183
Location: United States (MI)
Concentration: Marketing, General Management
WE: Business Development (Consumer Products)
Followers: 6

Kudos [?]: 55 [0], given: 40

Re: probabilty, urgent help ! [#permalink]

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

25/300 = 1/12 (B)
Intern
Joined: 05 Jul 2010
Posts: 27
Followers: 0

Kudos [?]: 21 [0], given: 7

Re: probabilty, urgent help ! [#permalink]

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19 Jul 2010, 04:33
You're right. It would be B.
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Re: probabilty, urgent help !   [#permalink] 19 Jul 2010, 04:33
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# probabilty, urgent help !

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