June 14, 2021 9:22 am
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June 14, 2021 9:25 am
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They tell us that the numbers in the set {5, 28, 10, 50, x, 7} have the sum of 120, so we can figure out that x=20, which also happens to be the mean. But we are looking for the median. Rearranged the set now looks like {5, 7, 10, 20, 28, 50}. Since 10 and 20 are the numbers in the middle, we'll split the difference and get 15.