Question 1058398: Billy knows that the last 4 digits of Sandi's phone number has 2, 3, 7, and 9, but he can't remember what order the numbers are in. What is the probability that he guesses the correct order on the first try?
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! Billy knows that the last 4 digits of Sandi's phone number has 2, 3, 7, and 9, but he can't remember what order the numbers are in. What is the probability that he guesses the correct order on the first try?
----------------
# of ways to succeed:: 1
# of possible orders:: 4! = 24
-----------
P(correct order) = 1/24
-----------------
Cheers,
Stan H.
-----------
|
|
|
