The average mark obtained by 15 students was 10 and the average mark obtained by 10 students was 15. What was the average mark obtained by all students?

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Statistics and Average

প্রশ্নঃ The average mark obtained by 15 students was 10 and the average mark obtained by 10 students was 15. What was the average mark obtained by all students?

  • ক. 10
  • খ. 8
  • গ. 12
  • ঘ. 15

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