Customers Arrive at a Carwash with on Average Once Every

Multiple Choice

Customers arrive at a carwash with on average once every 20 minutes. It seems likely that customer arrivals follow an exponential distribution. In a simulation, what formula would you use to estimate how long it will be until the next arrival occurs?

A) = 20 + (20 − 0) × RAND()
B) = NORM.INV(RAND() ,20,3)
C) = NORM.INV(RAND() ,20,0)
D) = 20 × LN(RAND() )
E) = − 20 × LN(RAND() )