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In a food processing and packaging plant, there are on average 3 packaging machine breakdowns per...

In a food processing and packaging plant, there are on average 3 packaging machine breakdowns per week. assume that the weekly machine breakdowns follow a poisson distribution

calculate the probability that there are no more than 3 machine breakdowns in a given week

math   Statistics-And-Probability   
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This is a question of poisson distribution with

For a Poisson Distribution

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