To calculate the probability of getting an order that is not accurate, we need to use the data provided in the table.

Step 1: Total number of orders

The total number of orders is the sum of all accurate and inaccurate orders across all four restaurants (A, B, C, and D).

Total number of orders: $329 + 32 + 261 + 56 + 245 + 30 + 129 + 15 = 1097$

Step 2: Total number of inaccurate orders

Inaccurate orders are provided in the second row of the table for each restaurant:

$32 + 56 + 30 + 15 = 133$

Step 3: Probability calculation

The probability of getting an inaccurate order is the ratio of the number of inaccurate orders to the total number of orders.

$P(\text{Not Accurate}) = \frac{133}{1097} \approx 0.121$

Final Answer:

The probability of getting an order that is not accurate is approximately 0.121 (rounded to three decimal places).

Let me know if you need further details or clarifications!

Here are 5 related questions you might want to consider:

1. What is the probability of getting an accurate order?
2. How would the probability change if another restaurant was added?
3. What is the probability of getting an inaccurate order from Restaurant A only?
4. How does the probability compare between different restaurants?
5. How can this data be used to improve order accuracy in restaurants?

Tip: When calculating probabilities, always ensure that the numerator (desired outcomes) and denominator (total outcomes) are clearly identified to avoid errors.