medium · GMAT Quant
A digital vault requires a 4-character password composed of uppercase letters (A through Z) and digits (0 through 9). If the first character must be a letter and the final character must be a digit
How many such passwords can be formed if repetition of characters is permitted?
- 26 × 36 × 36 × 10
- 26 × 26 × 26 × 10
- 26 × 36 × 36 × 36
- 10 × 36 × 36 × 26
- 26 × 35 × 34 × 10
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