Calculating Probability for Two Events: Longer Than 24.5 Minutes

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SUMMARY

The discussion centers on calculating the probability of two events exceeding 24.5 minutes. The correct probability is derived from the combinations of selecting two events from a specific group, resulting in the formula 11/55 * 10/54. This calculation clarifies the method of choosing two from the over 24.5 minute group and the overall group, correcting the initial misunderstanding of using 8/55 * 7/54.

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synkk
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As the question says the probability that both of them were longer than 24.5 minutes i'd of thought it would be in the 24-29 row, so that means 8/55 * 7/54, but the answer is 11/55 * 10/54, where did they get 11 from?
 
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How many ways are to choose 2 from the over 24.5 minute group? How many ways are there to choose 2 overall?
 
LCKurtz said:
How many ways are to choose 2 from the over 24.5 minute group? How many ways are there to choose 2 overall?

oh god I am stupid, thank you.
 

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