The average (arithmetic mean) of a set of n
numbers is 19. If the average of the 6 greatest
numbers in the set is 29 and the average of the
remaining numbers is 7, what is the value of n?
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Ответ:
5(y - 3) - 2 (3 - 2y) = 6
5(3 - 3) - 2(3 - 2 × 3) = 6
The equation works!
Y = 3
Great work!