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To solve this problem, we need to follow these steps:

1. **Calculate the average number of A-type cars produced from 2012 to 2014**:
   - For 2012: 1750 (in thousands)
   - For 2013: 1800 (in thousands)
   - For 2014: 2950 (in thousands)

   The average number of A-type cars from 2012 to 2014 is:
   \[
   \text{Average of A-type cars} = \frac{1750 + 1800 + 2950}{3} = \frac{6500}{3} = 2166.67 \text{ (in thousands)}
   \]

2. **Calculate the combined average number of B-type and C-type cars from 2013 to 2015**:
   - For B-type cars:
     - 2013: 2950 (in thousands)
     - 2014: 3020 (in thousands)
     - 2015: 3240 (in thousands)
   - For C-type cars:
     - 2013: 2070 (in thousands)
     - 2014: 3150 (in thousands)
     - 2015: 3290 (in thousands)

   First, calculate the average number of B-type cars from 2013 to 2015:
   \[
   \text{Average of B-type cars} = \frac{2950 + 3020 + 3240}{3} = \frac{9210}{3} = 3070 \text{ (in thousands)}
   \]

   Then, calculate the average number of C-type cars from 2013 to 2015:
   \[
   \text{Average of C-type cars} = \frac{2070 + 3150 + 3290}{3} = \frac{8510}{3} = 2836.67 \text{ (in thousands)}
   \]

   Now, add the averages of B-type and C-type cars:
   \[
   \text{Combined average of B and C cars} = 3070 + 2836.67 = 5906.67 \text{ (in thousands)}
   \]

3. **Calculate the percentage difference**:
   We need to find what percentage the average number of A-type cars from 2012 to 2014 is less than the combined average number of B-type and C-type cars from 2013 to 2015. The formula for percentage difference is:
   \[
   \text{Percentage difference} = \frac{\text{Difference}}{\text{Combined average of B and C}} \times 100
   \]
   where the difference is:
   \[
   \text{Difference} = 5906.67 - 2166.67 = 3740
   \]
   So, the percentage difference is:
   \[
   \text{Percentage difference} = \frac{3740}{5906.67} \times 100 \approx 63.34\%
   \]

   However, the question asks how much **less** the average of A-type cars is. So, we need to subtract this percentage from 100%:
   \[
   \text{Answer} = 100\% - 63.34\% = 36.66\% \approx 36.6\%
   \]

Thus, the correct answer is **A) 36.6%**.

Would you like more details or explanations? Here are some additional related questions:

1. How is percentage difference calculated between two averages?
2. Why do we subtract the percentage from 100% in this case?
3. How can this method be applied to other similar data sets?
4. What would happen if the data set had more years?
5. How can averages be used to predict future production?

**Tip**: Always make sure the percentage is interpreted correctly based on the phrasing of the question.

The average number of A-type cars produced by the company during 2012 to 2014 is what percent (rounded off to the 1 decimal place) less than the combined average number of B-type and C-type cars produced by the company from 2013 to 2015?

Calculate the percentage difference between the average production of A-type cars from 2012-2014 and the combined average of B-type and C-type cars from 2013-2015. This problem involves calculating averages and percentage difference.

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