Portada del sitio > Recursos GMAT > GMAT QUANTITATIVE QUESTION > Data Sufficiency > Probability > A box contains only red chips, white chips, and blue chips. If a chip is (...)

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?

Difficulty: 600-700 Level, Data Sufficiency (DS)

Lunes 25 de julio de 2022, por hurtado claudio

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.


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EXPLANATION:
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.

Answer: B.

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