Question 873512: How many integers from 3000 to 8999 inclusive contain no 7's?
Answer by Seutip(231)   (Show Source):
You can put this solution on YOUR website! The first digit can be a 3,4,5,6,8,9 .six possibilities.
The 2nd through 4th digit can be 0,1,2,3,4,5,6,8,9...nine possibilities
That means:
Your answer is 6x9x9x9=4374
Hope it helps! :)
Steffy
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