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Re: A bag has 20 marbles that are either black or white. [#permalink]
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Carcass wrote:

This question is part of GREPrepClub - The Questions Vault Project



A bag has 20 marbles that are either black or white.

Quantity A
Quantity B
The number of times one must randomly draw a marble from the bag, without replacing it, to ensure that at least 4 black marbles are selected
The number of times one must randomly draw a marble from the bag, without replacing it, to ensure that at least 4 white marbles are selected


A) Quantity A is greater.
B) Quantity B is greater.
C) The two quantities are equal.
D) The relationship cannot be determined from the information given.


We don't know what's in the bag. EX. what if they're all white or all black?

Since we already found 2 answers that that would change the answer, clearly we don't have a enough information.

D.
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Re: A bag has 20 marbles that are either black or white. [#permalink]
Hello from the GRE Prep Club BumpBot!

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