medium · GMAT Quant
An industrial sensor array formats error alerts using a 5-digit code built from digits 1, 2, 3, 4, 5, 6. Protocols specify that the code cannot begin with an even digit, and adjacent digits cannot be equal.
How many valid error alert codes can be created?
- 1,875
- 3,750
- 3,888
- 7,776
- 360
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