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| | Math Forum - Ask Dr. Math (Site not responding. Last check: 2007-11-06) |
 | | The Red set would have: R = {fire truck, police car, sports car} The Blue set would have: B = {pickup truck, station wagon} The White set would have: W = {ambulance, tractor-trailer rig} We can also organize our collection into trucks and cars. |
 | | This set would have: S = {fire truck, police car, ambulance} Now we have 6 different sets, all from the same collection of toys. |
 | | He asks us "What trucks do you have that are civil service vehicles?" Well, our Truck set (which we call T) has the fire truck, pickup truck and tractor-trailer rig - but they don't all have flashing lights. |
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