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

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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by Ian Stewart » Tue May 28, 2019 1:27 pm

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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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