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How many of the 60 balls in the basket are green?

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by BTGmoderatorLU » Mon May 27, 2019 4:45 pm

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B

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Source: Economist GMAT

How many of the 60 balls in the basket are green?

1) The probability of randomly picking a green ball out of the basket is \(\frac{1}{12}\).
2) Of the 12 balls that were taken out of the basket, 1 was green.

The OA is A
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Source: — Data Sufficiency |

by Ian Stewart » Tue May 28, 2019 1:27 pm
From Statement 1, 1/12 of the 60 balls are green, so 5 balls are green. So Statement 1 is sufficient.

Statement 2 only tells us about 12 of the balls, so is not sufficient.
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