The average (arithmetic mean) of a set of seven numbers is 8.
When an eighth number is added t...
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Mathematics, 06.03.2020 22:29 Monicaamm12983
The average (arithmetic mean) of a set of seven numbers is 8.
When an eighth number is added to the set, the average of the
eight numbers is still 8. What number was added to the set?
(A) 6
(B) 7
(C) 8
(D) 9
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Answers: 2
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