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In a cross-country race with a 35 participants, the mean finish time was 21 minutes . Which statement must be true ?

In a cross-country race with a 35 participants, the mean finish time was 21 minutes-example-1
User TheYann
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The answer is c because all the others can be eliminated, the mean is all the numbers added up and divided by the number of numbers.
User Mattbornski
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