The histogram shows the finishing times of the runners in a 10km cross-country race. 10km cross-country times 12- 10- 8- 6- 4- 2- o 30 40 50 60 70 80 90 Time (mins) a How many runners were in the race? b There was a target time of 67 minutes. How many runners failed to meet the target time? c i Create a grouped frequency table using the information in the histogram. ii Use your table to calculate an estimate of the mean time. Frequency density

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