Answer:
D 5
Explanation:
A 50
The first digit if odd then there are 5 possible numbers it could be (1, 3, 5, 7, 9)
Multiply by the number of digits the last one could be which is 10 (0, 1, 2, 3, 4, 5, 6, 7, 8, 9)
5 * 10 = 50
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