jackson629 jackson629

08-04-2021
Mathematics

contestada

how many different four-digit ID tags can be made if repeats are allowed

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aminerassam aminerassam

08-04-2021

Answer:

4!

Explanation:

4! = 4×3×2×1 = 24

here's an example:

1234
1243
1324
1342
1423
1432
2134
2143
2314
2341
2413
2431
3124
3142
3214
3241
3412
3421
4123
4132
4213
4231
4312
4321

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