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Mr. Ray loves the number 6 but hates the number 7. He's getting a new cell phone and has to choose a 10-digit phone number.
Mr. Ray loves the number 6 but hates the number 7. He's getting a new cell phone and has to choose a 10-digit phone number. The first number can't be a 0, 1 or 9. How many different phone numbers will have at least one 6, but no 7's
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