If the number of servers increases $($while everything else, including the service rate of each server and the arrival rate, stay the same$),$ the average of number of customers in service willSuppose that the interarrival times are exponentially distributed with the parameter $\backslash$lambda $.$ We may interpret $\backslash$lambda as:

Question $18$ options:

The standard deviation of the interarrival times

The average time between two consecutive service completions

The average time between two consecutive arrivals

The average arrival rate

The average service rate