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At a busy intersection, the speed of a number of passing cars in km/his recorded and the information is represented in the cumulative frequency graph

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At a busy intersection, the speed of a number of passing cars in km/his recorded and the information is represented in the cumulative frequency graph shown below. 50 - 45- 40 - 35 - 30 - Cumulative frequency 25 20 - 15 - 10 - 5 - 0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 Speed of cars (km/h)

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