Answer:
0.4
Explanation:
λ= number of arrival per unit time
μ= number of customers served per unit time
now we know that
System Utilization =
![(\lambda )/(\mu )](https://img.qammunity.org/2020/formulas/mathematics/college/cgi0n3lzbyoyvxd5cr9n1jx580izo9r7hk.png)
in our case it is given that
λ= 12 per hour
and μ= 30 customers served per hour
therefore system utilization=
![(12 )/(30 )](https://img.qammunity.org/2020/formulas/mathematics/college/bbp18j8y9ed4z3ebdmosekdw7q7clptsvb.png)
= 0.4
hence the final answer is 0.4
hope this helps