Answer:
20
Explanation:
For the computation of the average number of SUVs parked in the company's lot first it is required to compute the utilization which is shown below:-

where p indicates activity time which is equal to 3 days = 72 hours
a indicates an interarrival time which is equal to 2.4
m indicates the number of servers which is equal to 50
now we will put the values into the above formula

After solving the above equation we will get
u = 0.6
or
60%
now, the average cars parked in the company's lot is

= 50 - 30
= 20