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The mean of 8 observations is 40. If two of the observations, 22 and 28, are removed, what is the mean of the remaining observations?

Competition practiceData & Probability
  • A45
  • B42
  • C44
  • D46

Step-by-Step Solution

Total of all . Removing 22 + 28 = 50 leaves a total of 270 spread over 6 observations, so the new mean is 270 ÷ 6 = 45.
Answer: A) 45

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