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irina1246 [14]
3 years ago
11

Please could someone please explain how i do this, much appreciated!

Mathematics
1 answer:
Vilka [71]3 years ago
6 0
You want to multiply together the number of possible choices for each digit in the code.

0-9 is ten possible numbers, since repetitions are allowed (example code 2,2,2,2) there are ten possible choices per digit in the code.

10*10*10*10 = 10,000 four digit coded possible
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