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OpenStudy (anonymous):
A company places a seven-digit serial number on each part that is made. Each digit of the serial number can be any number from 0 through 9. Digits can be repeated in the serial number. How many different serial numbers are possible?
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OpenStudy (anonymous):
9999999 + 1
OpenStudy (anonymous):
+ 1 because 0000000 is valid
OpenStudy (savvy):
9000000 i.e. 9 X 10 X 10 X 10 X 10 X 10 X 10
OpenStudy (anonymous):
Wrong dude, sorry.
OpenStudy (savvy):
are the nos. starting with a zero allowed..???
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OpenStudy (anonymous):
yes..
OpenStudy (savvy):
oh..!!!! thnx...i didn't include them...!!!
OpenStudy (anonymous):
I know.
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