specify the sets b roster

{odd counting numbers less
than 11}

To specify the set B, with roster notation, containing odd counting numbers less than 11, we list the elements of the set within curly braces:

B = {1, 3, 5, 7, 9}

Explanation:
- We start with the condition, i.e., odd counting numbers less than 11.
- The odd counting numbers are the natural numbers (counting numbers) that are not divisible by 2.
- The counting numbers less than 11 (exclusive) are 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10.
- Out of these numbers, we choose only the odd numbers which are 1, 3, 5, 7, and 9.
- Hence, the set B contains these odd counting numbers less than 11: B = {1, 3, 5, 7, 9}.