SOLUTION: If three digits are randomly selected, find the probability of getting at least one 7. Digits can be used more than once. I tried doing the probability of not getting a 7 in ea

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Question 369381: If three digits are randomly selected, find the probability of getting at least one 7. Digits can be used more than once.
I tried doing the probability of not getting a 7 in each area:
P(not 7)= (.9)*(.9)*(.9)=.729
P(at least one 7)= 1-.729= .271
Is that right?
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Assuming it's 10 digits, 0 to 9:
1/10 + 1/10 + 1/10 = 3/10