Kate is a security agent at the PDX airport. She classifies the TSA security line, as a one$-$line many counters $(1$LMC$)$ queue. Bobby works at a retail store. He classifies the queues in his store as many$-$lines many counters $($MLMC$)$ queue. Assume that the:

Mean customer waiting time in the $1$LMC and MLMC setups are denoted by MWT$1$ and MWT$2$ respectively.

Variance in the customer waiting time in the $1$LMC setup is denoted by VAR$1,$ and the variance in the customer waiting time in the MLMC setup is denoted by VAR$2.$

Then, in comparing $1$LMC & MLMC$,$ one can expect:

Although MWT$1$ will likely be the same as MWT$2,$ VAR$1$ would not be equal to VAR$2.$

MWT$1$ MWT$2.$

MWT$1=$ MWT$2$ & VAR$1=$ VAR$2$

MWT$1>$ MWT$2.$