Captain jack sparrow is stranded on an island awaiting rescu

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Captain Jack Sparrow is stranded on an island, awaiting rescue. Suppose that the probability for a ship to come by in a particular day is 20%. Assuming each day is independent of the next, for at least how many days should he wait (including the day in which he gets rescued) so that the probability of him being rescued within these days is 60% or more?

 

 

Reference no: EM13786264

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