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Glass bottles are made by depositing melted glass in a mold. The melted glass is prepared...

Glass bottles are made by depositing melted glass in a mold. The melted glass is prepared in containers covered with a certain material that, as it wears, deposits particulate in the glass. This particle appears as defects in the finished parts. If we can assume that these defects appear randomly at a rate of 0.3 defects per bottle,
        What is the probability that a randomly selected bottle contains at least one defect?
        If we inspect 25 bottles, what is the probability of finding at least 3 defects in total?
        What is the expected number of total defects in 25 bottles? What does this value mean?
        If we inspect 25 bottles, what is the probability that he finds exactly 20 without defect?
Math   Statistics-And-Probability   
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