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The Justice Department reviews the cases of a simple random sample of persons who have been charged for speeding on provincial highways. The table below

The Justice Department reviews the cases of a simple random sample of persons who have been charged for speeding on provincial highways. The table below summarizes the speeds observed in these cases.

Speed (km/h) Number of cases

110 - 120 20

120 - 130 75

130 - 140 40

140 - 150 25

At least 150 20

What speed did the fastest 20% of the speeders exceed (determine the 80th percentile)

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