Final answer:
Set A, containing the odd numbers less than 10, is written as {1, 3, 5, 7, 9} using the listing method.
Step-by-step explanation:
The student has asked to write the set A of odd numbers less than 10 using the listing method. In this method, all members of the set are listed out, usually within braces. The odd numbers less than 10 are 1, 3, 5, 7, and 9. Therefore, the set A can be written as {1, 3, 5, 7, 9}.