The answer is 355. Simply add the numbers together like you would for two plus two. To check your work, a calculator is the best option.
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80 + 90 + 100 + 110 = 380/4 = 95
(100 + 90) ÷ 2 = 95
The average of 90 and 100 is 95.
mode = noneMode is the number that is repeated more often.
90