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Mathematics, 03.02.2020 10:56 ZOE1000000

{20, 30, 40, 50, 60, 70, 80} the mean of this set of numbers is a) 20 b) 50 c) 55 d) 60

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{20, 30, 40, 50, 60, 70, 80} the mean of this set of numbers is a) 20 b) 50 c) 55 d) 60...

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