medium · GMAT Quant
A smart grid controller constructs a 4-step power dispatch sequence using commands P_1, P_2, P_3, P_4, P_5, P_6, P_7, P_8. Safety guidelines stipulate that P_1 cannot be used in Step 1, and no two consecutive steps may use the same command.
How many valid power dispatch sequences can be generated?
- 2,401
- 2,744
- 3,584
- 4,096
- 1,470
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