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Mathematics 8 Online
OpenStudy (elizabethpase):

How many different four-digit numbers can you form using the digits 1, 2, 3, 5, 6, 7, and 9 with repetition allowed?

OpenStudy (wolf1728):

If you could use ALL digits then all the possible numbers would be 10*10*10*10 right?

OpenStudy (wolf1728):

So, if you could only use 7 digits, then the possible numbers would be 7 * 7 * 7 * 7

OpenStudy (elizabethpase):

thank you!

OpenStudy (wolf1728):

u r welcome :-)

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