Explanation:

- To find the average of the first 29 even numbers, list them from 2, 4, 6, ..., up to the 29th even number.

- The nth even number can be calculated as: 2n.

- So the 29th even number is: 2 × 29 = 58.

- The sequence of first 29 even numbers is an arithmetic sequence: 2, 4, 6, ..., 58.

- Average of an arithmetic sequence: (First term + Last term) / 2.

- Here, the average is: (2 + 58) / 2 = 60 / 2 = 30.

- Option:1, 30

- Option:2, 31

- Option:3, 32

- Option:4, 33