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Q: If the average of s numbers is r⁴ and the average of r number is s⁴, then find the average of all (r + s) numbers?
  • A. rs
  • B. rs(r² + s²)
  • C. r² + s²
  • D. rs(r² + s² – rs)
Correct Answer: Option D -
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Explanations:

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