The average of 6 observations is 12. A new seventh observation is included and the new average is decreased by 1. Find the seventh observation.

The average of 6 observations is 12. A new seventh observation is incl

1.	The average of 6 observations is 12. A new seventh observation is included and the new average is decreased by 1. Find the seventh observation.
A.	5
B.	7
C.	8
D.	9
Answer» B. 7

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The average of 6 observations is 12. A new seventh observation is included and the new average is decreased by 1. Find the seventh observation.

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