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If: 25k+12 = -13 Then: 25k = -13-12 => 25k = -25 So: k = -25/25 => -1
-13
13 - 12 - (-5) 1 - (-5) 1 + 5 6
25
First put them in order:11, 12, 13, 15, 16, 26, 26.Then use your fingers the numbers at the opposite ends:11, 12, 13, 15, 16, 26, 26.Then keep moving in11, 12, 13, 15, 16, 26, 26.11, 12, 13, 15, 16, 26, 26.Until you come to the middle:11, 12, 13, 15, 16, 26, 26.So the median is 15.