marcictristen marcictristen

18-05-2020
Mathematics

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The school day consists of six block classes with each being 60 minutes long. Lunch is 25 minutes. Transfer time between classes and/or lunch is 3 minutes. There is a fire drill scheduled to happen at a random time during the day.

What is the probability that the fire drill begins during lunch?

What is the probability that the fire drill begins durning transfer time?

If you are 2 hours late to school, what is the probability that you missed the fire drill?

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junjunxr junjunxr

18-05-2020

In total the time is 685 min not counting the transfer time and 706 including the transfer time. The probability of lunch fire drill is 25/706. Transfer time in total is 21 min so the probability is 21/207. 2 hours is 120 min. so there is a 120/706 probability that you missed it.

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peter060518 peter060518

18-05-2020

The answer above is correct

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