The number of observations in a group is 40. The average of the first – McqOptions

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1.	The number of observations in a group is 40. The average of the first 10 members is 4.5 and the average of the remaining 30 members is 3.5. The average of the whole group is
A.	4
B.	15/2
C.	15/4
D.	6
Answer» D. 6

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