1.

The mean of 15 observations is 30. If one more observation is included, then the new mean becomes 31 What is the 16th observationO (A) 44O (B) 46O (C) 45(D) 47​

Answer»

Answer:

the mean of 15 OBSERVATION is 30

total of 30 observation is 30×15=450

mean of 16 observation is 31

total of 31 observation is 31×16=496

so, 16 th observation is 496-450=46



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