Question 349764
probability of a call resulting in a reservation = .15
probability of a call not resulting in a reservation = .85


15 calls are made.


what is the probability that at least 1 of them will be a reservation?


that equals 1 minus the probability that all of them do not result in a reservation.


since the probability of any one call not resulting in a reservation equals .85, then the probability that all 15 calls will not result in a reservation equals .85^15.


that number is .087354219.


the probability that at least 1 call will result in a reservation is 1 minus the probability that no calls will result in a reservation.


that probability = .912645781.


that's the probability that at least 1 call will result in a reservation.