Suppose you are testing a new software and a bug causes errors randomly at a constant rate of once every 5 hours. What is the probability that four bugs will occur in the next 5 hours?
Let rate or intensity be l = 1 per 5 hours and number of events x be 4.
$f\left(Xequals;4\right)equals;\frac{{1}^{4}{e}^{-1}}{4excl;}$= 0.0153
Therefore, the probability that four bugs will occur in the next 5 hours is 0.0153.