A bar chart shows the number of students in four classes: Class A has 7 students, Class B has 10 students, Class C has 5 students, and Class D has 12 students. Which class has the most students, and what is the difference between the number of students in the class with the most and the class with the least?
Answer
Class D, Difference 7 students
The correct answer is Class D, Difference 7 students — Thus Class D has the most students, and the difference is 7 students.
Step-by-step solution
- List the student counts: A=7, B=10, C=5, D=12.
- Identify the maximum count: 12 students in Class D.
- Identify the minimum count: 5 students in Class C.
- Subtract the minimum from the maximum: 12 - 5 = 7.
- Thus Class D has the most students, and the difference is 7 students.
Common mistake: Confusing the maximum with the minimum, or subtracting the wrong way around.
Concept tested: Bar chart comparison
Published · How this solution was prepared and checked
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