Question

The mean of the number 10, 20, 30, 40 is
a)20
b)25
c)30
d)50​

Answer 1

Answer:

55 is the mean for dataset 10, 20, 30, 40, 50, . . . . , 90 & 100 from which the standard deviation about to be measured to estimate the common variation of the sample or population dataset from its central location.

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Answer 2

Answer:

50 cause 10+40 =50,20+30=50