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# GRE Math Challenge #64- The probability that events E and F

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GRE Math Challenge #64- The probability that events E and F [#permalink]  03 May 2015, 00:53
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Question Stats:

50% (00:16) correct 50% (02:30) wrong based on 2 sessions
The probability that events E and F will both occur is 0.42

Quantity A: The probability that event E will occur
Quantity B: 0.58
• Quantity A is greater.
• Quantity B is greater.
• Both Quantities are Equal
• Cannot be determined
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Sandy
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Re: GRE Math Challenge #64- The probability that events E and F [#permalink]  11 Mar 2018, 07:41
sandy wrote:
The probability that events E and F will both occur is 0.42

Quantity A: The probability that event E will occur
Quantity B: 0.58
• Quantity A is greater.
• Quantity B is greater.
• Both Quantities are Equal
• Cannot be determined

Based on the info, we know that E and F at least both have the probability of 0.42.

Meanwhile, since the maximum of probability is 1, then we can deduce that 0.42=<E<=1.

Hence, ANS D
Re: GRE Math Challenge #64- The probability that events E and F   [#permalink] 11 Mar 2018, 07:41
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