Explanation:

- The first 6 multiples of 10 are: 10, 20, 30, 40, 50, and 60.

- To find the average, add these numbers together.

- The sum is: 10 + 20 + 30 + 40 + 50 + 60 = 210.

- Divide this sum by 6 (the number of multiples).

- The average is: 210 ÷ 6 = 35.

- Option 1 (36): This suggests a higher average. It's incorrect.

- Option 2 (35): This matches our calculated average.

- Option 3 (34.5): This suggests a lower average. It's incorrect.

- Option 4 (32): This suggests a much lower average. It's incorrect.

- Correct Answer: Option 2, 35