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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?
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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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