I got the following equation from the lesson's summary: P(X=k) = (e^-µ µ^K) / k! When calculating...

I got the following equation from the lesson's summary:

P(X=k) = (e^-µ µ^K) / k!

When calculating the probability while answering the homework problems I always seemed to be off by a very small amount. The only explanation given under the problem after hitting show answer is 1 - P(x=0) -P(x=1) - ... up until x = the number given in the question. I am confused where this equation or these types of calculations are coming from and would love some help!

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Thank you.

orchestra answered 1 year ago

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