There are 20 cars in my building's parking lot. All of the cars are red or white. Also, all the cars are either 2-door or 4-door. 12 of them are red, 15 of them are 4-door, and 4 of them are 2-door and white. How many of the cars are 4-door and red?

Firewolf  Jun 12, 2018

make a 2-way table


ChowMein  Jun 12, 2018

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