Cars arrive at a car wash randomly and independently; the probability of an arrival is the same for any two time intervals of equal length. The mean arrival rate is 10 cars per hour. What is the probability that 15 or more cars will arrive during any given hour of operation?

Therefore, the probability is P=0.161.

Step-by-step explanation:

We know that cars arrive at a car wash randomly and independently; the probability of an arrival is the same for any two time intervals of equal length.  We calculate the probability that 15 or more cars will arrive during any given hour of operation.

We know that the mean arrival rate is 10 cars per hour ⇒ λ=10.

We use the Possion formula:

we get

Therefore, the probability is P=0.161.

if you are saying purchasing 3 social media ads and one newspaper ad counts as one purchase then there are:

6 purchases

if you are asking how many of each then:

18 social media ads

6 newspaper ads

the highest percentage for deaths in construction from highest to lowest is as follows: falls, struck by objects, electrocution, and caught-in/between. these four are collectively known as fatal four.

in the case of falls, the type that is responsible for the overall highest death in the category is falls from roofs.