medium · GMAT Quant
An automated testing suite generates a 4-character test run tag using T_1, T_2, T_3, T_4, T_5. Guidelines require that the first character must not be T_1 or T_2, and adjacent characters must not match.
How many unique test run tags can be generated?
- 192
- 320
- 375
- 625
- 72
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