# Probability Calculations

A study of a certain road intersection revealed that the mean number of auto accidents per month at the intersection is 3.4. Assuming the distribution of accidents per month is Poisson.

(A) Find the probability that there are exactly 4 accidents in some month.

(B) Find the probability that there are no accidents in some month.

(C) Find the probability of at least one accident in some month.

(D) Find the probability that there are 2 to 4 accidents in some month.

https://brainmass.com/statistics/probability/probability-calculations-auto-accidents-140242

#### Solution Summary

This problem shows how Excel formulae can be used to evaluate discrete probabilities.

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