The question asks us to identify the item that has the minimum average number of items sold across the four quarters (Q1, Q2, Q3, and Q4). To find this, we need to calculate the total number of items sold for each item and then divide by the number of quarters to get the average.

The table provides the number of items brought (B) and sold (S) for each item in each quarter. We are interested in the 'S' values for each item across Q1, Q2, Q3, and Q4.

Let's calculate the total items sold and the average items sold for each item.

Calculating Total and Average Items Sold per Item

We sum the 'S' values for each item across all four quarters (Q1, Q2, Q3, Q4).

• Item A: Total sold = 170 + 335 + 320 + 370 = 1195
  Average sold for A = $\frac{1195}{4} = 298.75$
• Item B: Total sold = 180 + 200 + 330 + 340 = 1050
  Average sold for B = $\frac{1050}{4} = 262.5$
• Item C: Total sold = 210 + 310 + 200 + 200 = 920
  Average sold for C = $\frac{920}{4} = 230$
• Item D: Total sold = 250 + 290 + 180 + 240 = 960
  Average sold for D = $\frac{960}{4} = 240$
• Item E: Total sold = 275 + 315 + 170 + 190 = 950
  Average sold for E = $\frac{950}{4} = 237.5$

Comparing Average Items Sold

Now, let's list the average items sold for each item:

• Item A: 298.75
• Item B: 262.5
• Item C: 230
• Item D: 240
• Item E: 237.5

Comparing these average values, we can see that the minimum average items sold is 230, which corresponds to Item C.

Identifying the Item with Minimum Average Sold

Based on our calculations, the item with the minimum average items sold for all quarters is Item C.

Revision Table: Key Calculations

Additional Information on Calculating Averages

The average, also known as the mean, is a fundamental concept in statistics used to find a typical value in a set of numbers. To calculate the average of a set of values, you sum all the values and then divide the sum by the count of the values in the set.

In this problem, we calculated the average items sold for each item across four quarters. The set of values for each item consisted of the number of items sold in Q1, Q2, Q3, and Q4. The count of values was 4 (because there are four quarters).

The formula for the average is:

Average = $\frac{\text{Sum of all values}}{\text{Number of values}}$

Understanding how to calculate averages from tables is a common data interpretation skill required in many exams.