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John just bought a brand new cell phone and is considering buying a warranty. The warranty costs 200
euros and is worth 1000 euros if his phone breaks. John estimates that there is a 10% chance of his phone
breaking
Find the expected value of buying the warranty.
euros

Among the most famous of all meteor showers are the perseids, which occur each year in early august. in some areas the frequency of visible perseids can be as high as 40 per hour. given that such sightings are poisson events, calculate the probability that an observer who has just seen a meteor will have to wait at least five minutes before seeing another.