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The mean of 20 observations in an experiment is 4, lf the observed largest value is 23, ...

The mean of 20 observations in an experiment is 4, lf the observed largest value is 23, find the mean of the remaining observations.
Take Free Practice Test On 2026 JAMB UTME, Post UTME, WAEC SSCE, GCE, NECO SSCE
  • A 4
  • B 3
  • C 2.85
  • D 2.60
  • E 2.56
Correct Answer: Option B
Explanation:
Mean of 20 observations = 4
All the observations = 20 x 4 = 80
Largest observed value = 23
Remaining observation = 80 - 23 = 57
Mean of observation = 57/19 = 3

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