SOLUTION: If the average (arithmetic mean) of seven numbers is -8 and the average of five of the numbers is 6, what is the average of the other two numbers? (A) -43 (B) -30 (C) -14 (D)

Algebra ->  Average -> SOLUTION: If the average (arithmetic mean) of seven numbers is -8 and the average of five of the numbers is 6, what is the average of the other two numbers? (A) -43 (B) -30 (C) -14 (D)       Log On


   

Question 324306: If the average (arithmetic mean) of seven numbers is -8 and the average of five of the numbers is 6, what is the average of the other two numbers?
(A) -43 (B) -30 (C) -14 (D) -13 (E) -6


Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
%28A%2BB%2BC%2BD%2BE%2BF%2BG%29%2F7=-8
1.A%2BB%2BC%2BD%2BE%2BF%2BG=-56
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%28A%2BB%2BC%2BD%2BE%29%2F5=6
2.A%2BB%2BC%2BD%2BE=30
Subtracting eq. 2 from eq. 1,
F%2BG=-56-30
%28F%2BG%29%2F2=-86%2F2
%28F%2BG%29%2F2=-43
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A) is the correct answer.