Asked by Lacie
How many positive four-digit integers have 3 as their hundreds digit and 5 or 9 as their ones digit?
Answers
Answered by
oobleck
thousands: 9 choices
tens: 10 choices.
So, 9*1*10*2 = ___
tens: 10 choices.
So, 9*1*10*2 = ___
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