Cars arriving for gasoline at a particular gas station follow a Poisson distribution with a mean of

Question:

Cars arriving for gasoline at a particular gas station follow a Poisson distribution with a mean of 5 per hour.

a. Determine the probability that over the next hour only one car will arrive.

b. Compute the probability that in the next 3 hours more than 20 cars will arrive.

Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...