To find the mean of the numbers, first sum them up: 18 + 15 + 21 + 10 + 24 + 21 + 18 + 16 + 20 + 22 + 18 + 18 + 12 + 21 + 25 + 20 + 19 + 23 = 346. Then, divide this total by the number of values, which is 18. Thus, the mean is 346 ÷ 18 ≈ 19.22.
(-18-23+20)/3= (-21)/3=-7
21
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23
Just over 20 18 + 19 + 21 + 23 = 81 81 / 4 (numbers) = 20.25
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(-18-23+20)/3= (-21)/3=-7
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All the numbers are composite except the ones in bold: 18 19 20 21 22 23 24 25.
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to find the mean, you add all the numbers together then divide by how many numbers there are. so the mean for 4 8 18 21 22 23 is 16
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23