Buses running a bus line near Desdemona's house run every 15 minutes. Without paying attention to the schedule she walks to the nearest stop to take the bus to town.

Thank you for the opportunity to help you with your question!

This is poisson distribution with lambda =15

P(x>10)= 1-P(x<10)= 1-.1185 =.8815

How did you come up with the number .1185?

I got that from excel =Poisson.dist(10,15,true)

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