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Q: The average of 52, 71, 43, 22, a and b is 55 and the average of 42, 45, 49, 51 42 c and d is 53. What is the average of a, b, c and d?
  • A. 54
  • B. 142
  • C. 71
  • D. 54.7
Correct Answer: Option C -
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Explanations:

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