If the mean of 3 observations is 13.5 and if the mean of 4 observations is 14, then the value of 4th observation is:
(a) 15.0
(b) 15.5
(C) 16.5
(d) 14.5
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Answer:
14.5
Step-by-step explanation:
Iam guessing I really don't know if it is correct
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