Question

The total sum in marks for 50 students in a class is 2250. Find the average marks in the class.

• A. 40
• B. 45
• C. 50
• D. 55

Hint:

Average = total marks divided by number of students, so divide 2250 by 50.

Answer 1

The Correct Option is B

Step 1: Understanding the Question:
We know the total marks of all students and the number of students. The average is the marks that each student would get if the total were shared equally.

Step 2: Key Formula or Approach:
\[ \text{Average} = \frac{\text{Sum of all marks}}{\text{Number of students}} \]

Step 3: Calculate:
Sum of marks = 2250. Number of students = 50.
\[ \text{Average} = \frac{2250}{50} = 45 \]

Step 4: Check the other options:
If the average were 40, the total would be \(40 \times 50 = 2000\). For 50 it would be 2500, and for 55 it would be 2750. Only 45 gives \(45 \times 50 = 2250\), so options (1), (3) and (4) are wrong.

Final Answer:
The average marks in the class are 45. This is option (2). \[ \boxed{45} \]