Question

A bar graph shows the number of students in 5 departments of a college. If the average number of students is 240 and the number of students in the Science department is 320, how many students are there in total in the other four departments?

• A. 960
• B. 880
• C. 920
• D. 800

Hint:

To find the total from an average, multiply by the number of groups. Subtract known values to get the rest.

Answer 1

The Correct Option is B

To solve the problem, we need to determine the total number of students in the remaining four departments, given the average and the number in one department.

1. Understanding the Concepts:

- Average: The sum of values divided by the number of values.
- Total Students: Multiply the average by the number of departments to get the total.
- Subtract: Subtract the number of students in the Science department to find the total in the other departments.

2. Given Values:

- Average number of students = 240
- Number of departments = 5
- Students in Science = 320

3. Calculating Total and Remaining:

Total students in all departments = \( 240 \times 5 = 1200 \)
Students in other four departments = \( 1200 - 320 = 880 \)

Final Answer:

The number of students in the other four departments is 880.