1. **State the problem:** We are given the number of magazines purchased by six customers: 1, 7, 3, 2, 3, 4. 2. **Recall what the mode is:** The mode is the number that appears most frequently in a data set. 3. **List the data and counts:** - 1 appears 1 time - 7 appears 1 time - 3 appears 2 times - 2 appears 1 time - 4 appears 1 time 4. **Determine the mode:** Since 3 appears the most (2 times), the mode is **3**. 5. **Answer:** The mode is **3**.