The following cumulative frequency curve shows the distribution of speeds of 60 cars. 60 Cumulative 50 frequency 40 30 20 10 0- 10 20 30 40 50 60 70 80 90 100 Speed, km/h a) Use this graph to estimate the median and the inter – quartile range. b) If 60% of the cars were caught by the speed camera. What is the speed limit on this road?

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