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A researcher recorded the amount of time each patron at a fast food restraunt spent waiting in line for service during noontime Saturday. The frequency

A researcher recorded the amount of time each patron at a fast food restraunt spent waiting in line for service during noontime Saturday. The frequency table at the right summarizes the data collected. First, extend the table to include a relative frequency column. Then, if we randomly select one of the patrons represented in the table, what is the proabability that the waiting time is at most 11 minutes?

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