SOLUTION: the mean of 4 numbers is 70 when a fifth number is included the mean of the five numbers is 80 what is the fifth number
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Question 755751: the mean of 4 numbers is 70 when a fifth number is included the mean of the five numbers is 80 what is the fifth number Answer by reviewermath(1029) (Show Source):
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the mean of 4 numbers is 70 when a fifth number is included the mean of the five numbers is 80 what is the fifth number
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A:
fifth number = 5(80) - 4(70) =
