Question

Using the table, which course has the lowest average enrollment across the three years? 

• A. Course A
• B. Course B
• C. Course C
• D. Course D
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Hint:

To find the lowest average, calculate the total for each category, divide by the number of periods, and compare to identify the minimum.

Answer 1

The Correct Option is D

- Step 1: Calculate total for Course A. Sum: $50 + 55 + 60 = 165$. Average: $165 \div 3 = 55$. 
- Step 2: Calculate total for Course B. Sum: $60 + 65 + 70 = 195$. Average: $195 \div 3 = 65$. 
- Step 3: Calculate total for Course C. Sum: $40 + 45 + 50 = 135$. Average: $135 \div 3 = 45$. 
- Step 4: Calculate total for Course D. Sum: $30 + 35 + 40 = 105$. Average: $105 \div 3 = 35$. 
- Step 5: Compare averages. Course D: 35, Course C: 45, Course A: 55, Course B: 65. Course D has the lowest average. 
- Step 6: Final conclusion. Option (4) Course D is the correct answer.