In a Single Server, Poisson Arrival, Constant Service Time System $\lambda=9$

Multiple Choice

In a single server, Poisson arrival, constant service time system with $\lambda=9$ per hour and ${ }^{\mu}=10$ per hour, $\mathrm{W}$ (in minutes) will be equal to

A) $5 / 9$
B) $4.05 / 9$
C) 33.3
D) 60