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Q: 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
Correct Answer: Option D -
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Explanations:

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