The mean of 25 observations is 36. If the mean of first 13 observations is 32 and that of the last 13
observations is 39, find the 13th observation.
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Answer:
Step-by-step explanation:
Total observations = 25*36= 900
Sum of first 13 observations = 13*32= 416
Sum of last 13 observations = 13*39= 507
13th observation =(416+507)-900 = 23
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