In a residential colony, 180 households have a car, 120 have a bike, 100 have a bicycle, 70...
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In a residential colony, 180 households have a car, 120 have a bike, 100 have a bicycle, 70 have both a car and a bike, 60 have both a bike and a bicycle, 50 have both a car and bicycle, 50 have both a car and bicycle, 30 households have all three vehicles. If the total number of households is 250, then how many households have none of the three?
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Answer: A. 7
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