SOLUTION: Mr. J has extension 8149. If you were to randomly dial an extension, what is the probability that you would not dial Mr. J on the first attempt?

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Question 1001360: Mr. J has extension 8149. If you were to randomly dial an extension, what is the probability that you would not dial Mr. J on the first attempt?
Answer by jorel555(1290) About Me  (Show Source):
You can put this solution on YOUR website!
Seeing as how there are 10000 possible 4-digit extensions (1-9999, plus 0000), your chance of guessing any 1 code correctly is 1/10000. And your chance of guessing incorrectly is 9999/10000, or .9999!!!!!!!!!!!!