Advanced Placement (AP), 24.02.2021 14:00 TornSnowFlake336

On any given test, there is a 41% chance that a student will get a B or better. A teacher randomly selects tests until there is a B or better. Assume the selections are independent. What is the probability that it will take exactly 4 selections to get a B or better? What is the probability that it will take more than 3 selections to get a B or better?

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On any given test, there is a 41% chance that a student will get a B or better. A teacher randomly s...