A box contains only red chips, white chips, and blue chips. : GMAT Data Sufficiency (DS)
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# A box contains only red chips, white chips, and blue chips.

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A box contains only red chips, white chips, and blue chips. [#permalink]

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14 Dec 2012, 04:19
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A box contains only red chips, white chips, and blue chips. If a chip is randomly selected from the box, what is the probability that the chip will be either white or blue?

(1) The probability that the chip will be blue is 1/5.
(2) The probability that the chip will be red is 1/3.
[Reveal] Spoiler: OA
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Re: A box contains only red chips, white chips, and blue chips. [#permalink]

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14 Dec 2012, 04:23
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A box contains only red chips, white chips, and blue chips. If a chip is randomly selected from the box, what is the probability that the chip will be either white or blue?

The probability that the chip will be either white or blue, equals to the probability that the chip will NOT be red, thus P(white or blue)=1-P(red).

(1) The probability that the chip will be blue is 1/5. Not sufficient.

(2) The probability that the chip will be red is 1/3. P(white or blue)=1-P(red)=1-1/3=2/3. Sufficient.

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Re: A box contains only red chips, white chips, and blue chips. [#permalink]

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14 Dec 2012, 04:35
A box contains only red chips, white chips, and blue chips. If a chip is randomly selected from the box, what is the probability that the chip will be either white or blue?

(1) The probability that the chip will be blue is 1/5.
(2) The probability that the chip will be red is 1/3.

Too simple

To find : probability of white or blue (which is equivalent to 1-probability of red)

S1 : there is no probability of white -- INSUFF
S2 : red - 1/3
Therefore p(W/B) = $$1-1/3 = 2/3$$
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Re: A box contains only red chips, white chips, and blue chips. [#permalink]

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06 Sep 2014, 15:42
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Re: A box contains only red chips, white chips, and blue chips. [#permalink]

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22 Feb 2016, 16:47
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: A box contains only red chips, white chips, and blue chips.   [#permalink] 22 Feb 2016, 16:47
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