Correct, Average = Sum ÷ Items, Sum of 90, 30, 24 is 144, Average of 90, 30, 24 is 48, Total: 600m + 400m = 1000m, Average of 20 and 16 is 18, Average = Sum ÷ Days, Incorrect, Average = Sum × Items, Sum of 90, 30, 24 is 48, Average of 90, 30, 24 is 144, Total: 600m + 400m = 500m, Average of 20 and 16 is 36, Average = Sum × Days

UNIT 1.3

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