Source: GMAT Prep
A company plans to assign identification numbers to its employees. Each number is to consist of four different digits from 0 to 9, inclusive, except that the first digit cannot be 0. How many different identification numbers are possible?
A. 3,024
B. 4,536
C. 5,040
D. 9,000
E. 10,000
The OA is B
A company plans to assign identification numbers to its employees. Each number is to consist of four different digits
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