The mean of 7 observations is 18. Another observation is included and – McqOptions

MCQOPTIONS

1.	The mean of 7 observations is 18. Another observation is included and the new mean becomes 18.5. The 8th observation is:A. 20B. 21C. 22D. 23
A.	D
B.	A
C.	C
D.	B
Answer» D. B

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