Question

The average marks obtained by a group of 25 students was 36. One student left the group, as a result of which the average of the remaining students grow to 37.5. Soon after another joined the same group, as a result of which the average marks dropped to 37.2. Find the average marks of the student who left and the student who joined the group.

• A. 37.5
• B. 22.5
• C. 30
• D. 15

Answer 1

Answer: (D)