SOLUTION: If you forget the phone number and you dial a 7 digit number at random what is the probability that would get the number correct in one attempt? I know (or I think know) that eac

Algebra ->  Probability-and-statistics -> SOLUTION: If you forget the phone number and you dial a 7 digit number at random what is the probability that would get the number correct in one attempt? I know (or I think know) that eac      Log On


   

Question 426067: If you forget the phone number and you dial a 7 digit number at random what is the probability that would get the number correct in one attempt? I know (or I think know) that each number is dependent of the previous number/numbers being correct and that is a 1/10 chance for each number but I am stuck at this point.
Thanks for your help.
Columbine
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
If you forget the phone number and you dial a 7 digit number at random what is the probability that would get the number correct in one attempt? I know (or I think know) that each number is dependent of the previous number/numbers being correct and that is a 1/10 chance for each number but I am stuck at this point.
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# of correct numbers: 1
# of possible numbers: 10^7
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P(get number correct) = 1/10^7 = 1/10,000,000
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Cheers,
Stan H.
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