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In a 12-hour period of time, a drawbridge opens 8 times, holding traffic for 15 minutes each time. If a car approaches the bridge during this 12-hour time, find the probability that the bridge is open.

 Sep 22, 2021
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In the 12-hour period, the drawbridge is open: 8  *  15 ==120 minutes==2 hours.

 

Then probability is: 2 / 12 ==1 / 6

 Sep 22, 2021

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