Answer:
The probability that the server is busy is P=0.56.
Step-by-step explanation:
We have a quieing theory problem with M/M/1
In queing theory, the probability of the server being busy can be expressed as:

being μ: the time between services and λ: the time between customers arrival.
Then we can calculate:

The probability that the server is busy is P=0.56.
Answer:C
Step-by-step explanation:
Answer:
65
Step-by-step explanation:
66
Answer:
3×9=27 the two numbers right to use is 2and7