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19+17+23+17=76 76/4 (the number of numbers) = 19
More correctly in Maths. it is the MEAN. Hence mean -= (12 + 16 + 23) / 3 means = 51/3 mean = 17 .
Well 17+13+27+33+25 = 115 so 115/5=23 The mean is 23
mean(18, 23, 39, 10, 22, 17, 16, 15) = (18 + 23 + 39 + 10 + 22 + 17 + 16 + 15) ÷ 8 = 160 ÷ 8 = 20
mean = the sum of 23, 19, 26, 17, 21, 24, 22 divided by 7 = 152/7 =21.71