# Practice GMAT Questions

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**B**

- There are 30 quarters in the sack (7+6+4+13).
- The probability that Karen gets her wish is P(New Jersey), which is (New Jersey Quarters)/(Total Quarters) = 4/30.
- Stated differently: There are 4 quarters, out of 30, that are New Jersey. So Karen has four possibilities of getting her wish.
- The fact she only gets to pick one quarter is not relevant. All that matters is what portion of the total number of quarters is the New Jersey version. So 4/30 quarters fit the bill. She also has 26/30 quarters that do not work. That means the correct response is 4/30, but you should reduce fractions when possible. That makes the correct response 2/15.
- Both C and D are large fractions not much less than 1. For either of those choices to be correct would mean she is almost certain to get her wished-for quarter. But logic should tell you the odds are slim. That leaves choices A and B.

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