(Choose 1 answer)
The time between customer arrivals at a furniture store has an approximate exponential distribution with mean = 8.5 minutes. If a customer just arrived, find the probability that the next customer will not arrive for at least 20 minutes.
Α. 0.095089
Β. 0.904911
C. 0.653770
D. 0.346230
E. None of the other choices is correct
