GMAT Challenge Question

This week’s GMAT challenge question from PrepForTests takes you back to probability.

The probability that a certain coin turns up heads when it is flipped is 1/2. If this coin is flipped 3 times then what is the probability that heads turns up at least twice?

1. 1/8
2. 1/3
3. 1/2
4. 3/4
5. 7/8

Review your answer.

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