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Sum them : 340
Count them: 4 numbers
Divide sum by number of numbers = 340/4 = 85.
Alternatively, in this case, you may notice that the numbers are evenly spaced. The middle two numbers are 80 and 90 so halfway between then will be the overall mean. This only works for the arithmetic mean of evenly spaced numbers.
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Earn +20 ptsQ: How do you find the average for 100 70 80 90?
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Continue Learning about Math & Arithmetic
What is the average of 88 70 82 80 100 70 80 80?
81.25
How do you write 70 percent of 80 as a ratio?
70% of 80 = 80*70/100 = 56/100 or 14/25
What is the mean of 70 80 84 90 92 100?
The mean, or average is 86
What is 80 minus 70 percent?
80 - 70% = 80 x (1 - (70/100)) = 24
What is the range of these numbers 90 80 110 90 120 130 100 110 160 80 100 70 80?
70 80 80 80 90 90 100 100 110 110 120 130 160Range = 160 - 70 = 90
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