Answer:
d. 0.0213
Step-by-step explanation:
If a variable follow a poisson distribution, the probability that x events happens in a specific time is given by:
[tex]P(x)=\frac{e^{-a}*a^{x} }{x!}[/tex]
Where a is the mean number of events that happens in a specific time.
So, in this case, x is equal to 9 arrivals and a is equal to 16 customers per hour. Replacing this values, the probability is:
[tex]P(9)=\frac{e^{-16}*16^{9} }{9!}[/tex]
[tex]P(9)=0.0213[/tex]
