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# If a bottle is to be selected at random from a certain

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Manager
Joined: 16 Apr 2009
Posts: 236
Schools: Ross
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Kudos [?]: 86 [0], given: 10

If a bottle is to be selected at random from a certain [#permalink]

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11 Aug 2009, 11:18
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Question Stats:

100% (01:37) correct 0% (00:00) wrong based on 2 sessions

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If a bottle is to be selected at random from a certain collection of bottles, what is the probability that the bottle will be defective?
(1) The ratio of the number of bottles in the collection that are defective to the number that are not defective is 3:500.
(2) The collection contains 3,521 bottles.

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Senior Manager
Joined: 20 Mar 2008
Posts: 452
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Kudos [?]: 123 [0], given: 5

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11 Aug 2009, 12:02
St. 1: Probability = 3/503. Sufficient.
St. 2: How many are defective, how many or not defective. Cannot be determined. Hence insufficient.

A for me.
Re: probability   [#permalink] 11 Aug 2009, 12:02
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