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

User Cfnerd
by
4.5k points

1 Answer

4 votes

Answer:

4!

Step-by-step explanation:

4! = 4×3×2×1 = 24

here's an example:

  1. 1234
  2. 1243
  3. 1324
  4. 1342
  5. 1423
  6. 1432
  7. 2134
  8. 2143
  9. 2314
  10. 2341
  11. 2413
  12. 2431
  13. 3124
  14. 3142
  15. 3214
  16. 3241
  17. 3412
  18. 3421
  19. 4123
  20. 4132
  21. 4213
  22. 4231
  23. 4312
  24. 4321
User Serejja
by
5.1k points
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