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Q: The mean score of class A of 40 students in the mathematics test of 30 marks is 23. The mean score of class B of 45 students in the same test is 22. What is the ratio of the mean score of both the classes to that of class A?
  • A. 380 : 391
  • B. 390 : 382
  • C. 382 : 391
  • D. 391 : 382
Correct Answer: Option C -
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Explanations:

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