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explain it please 4. A sample of light trucks using diesel fuel revealed the following distribution based on fuel efficiency, i.e., litres per 100 km.

explain it please

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4. A sample of light trucks using diesel fuel revealed the following distribution based on fuel efficiency, i.e., litres per 100 km. Litres/100km Number of Trucks 6 to under 9 9 to under 12 12 to under 15 15 to under 18 18 to under 21 21 to under 24 What is the arithmetic mean in litres per 100 km

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