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2 years ago

8

The door code to gain access to a top-secret laboratory is 6 digits. The first 3 digits of the code are all odd, and the last 3

digits are all even. Digits can be used more than once. How many possible codes are there?

1 answer:

WINSTONCH [101]2 years ago

3 0

5 odd numbers and 5 even numbers
since they can be repeated
5*5*5=first 3 digits
5*5*5=last 3 digits
in all
5*5*5*5*5*5=15625 ways

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