SOLUTION: [ If three numbers average 6, and two of these average 5, what is the third number? ]

Question 816103: [ If three numbers average 6, and two of these average 5, what is the third number? ]

Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
(i + j + k)/3 = 6
i + j + k = 18
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(i + j)/2 = 5
i + j = 10
i = 10 - j
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i + j + k = 18
10 + k = 18
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Answer:
k = 8
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