(a + b + c + d)/4 = 5
(a + b + c + d +8)/4 = ((a + b + c + d)/4 + 8/4 = 5 + 2 = 7
Mackenzie E.
asked • 12/09/18Set of four numbers has the mean of exactly 5. If one of the numbers is increased by eight what would be the mean of new set?
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