What would the system utilization be if there were $3$ servers in a system with an arrival rate of $6$ per hour and a service time of $15$ minutes. What is the system utilization?

Question $18$ options:

a$)$

$0\mathrm{.}13.$

b$)$

$0\mathrm{.}30.$

c$)$

$0\mathrm{.}50.$

d$)$

$1\mathrm{.}50.$

e$)$

$2\mathrm{.}00.$