Gene made a two-digit code. The first digit is odd. How many possible codes can he choose from?

A 50

B 100

C 15

D 5

A 50

Step-by-step explanation:

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