Practicing Success
Between 3 p.m. and 5 p.m. the average number of phone calls per minute coming into the helpline desk of a bank is 5. The probability that during one particular minute there will be only one phone call is : |
$0.5e^{-5}$ $5e^{-5}$ $e^{-5}$ $25e^{-5}$ |
$5e^{-5}$ |