How many four-digit whole numbers are there such that the leftmost digit is odd, the second digit is even, and all four digits are different?
Answer Choices
A. 1120
B. 1400
C. 1800
D. 2025
E. 2500
How many four-digit whole numbers are there such that the leftmost digit is odd, the second digit is even, and all four digits are different?
Answer Choices
A. 1120
B. 1400
C. 1800
D. 2025
E. 2500