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blagie [28]
3 years ago
15

a 4-digit password is a number that begins with a 3 and does not contain a zero or nine. if digits can be repeated, how many pos

sible passwords are there?
Mathematics
1 answer:
stellarik [79]3 years ago
4 0
Hello,
it remainds 8 digits: 1,2,3,4,5,6,7,8

8*8*8=512 possibilities;
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