Answer:
Option b that is 1.33 is the right choice.
Step-by-step explanation:
Given:
Mean rate of arrival = 8 planes/hr
Service time = minute/plane
Mean service rate = = planes/hr
Applying the concept Poisson-distributed arrival and service rates (exponential inter-arrival and service times)(M/M/1) process:
We have to find mean number of planes waiting to land that is mean number of customers in the queue .
Mean number of customers in queue .
⇒
Considering, , is also mean number of customers in service.
⇒
⇒ Plugging the values.
⇒
⇒
⇒
So,
Mean number of planes in holding and waiting to land = 1.33
let the number be x for all the qns
1. x/3+4=7
x/3=3
x=9
2. x^2+7=32
x^2=25
x=5 or -5
3. 30÷7x=1
30=7x
x=30/7 or 4.29(3.s.f.)
Answer:
its in the 1,000 place
Step-by-step explanation:
What do you need help on exactly
C since if you solve the problem you get 19.62 which rounds to 20