<human>:  A bumper car rink has 12 red cars. They have 2 fewer green cars than they have red cars. They have 3 times the number of blue cars as they have green cars. The rink also has yellow cars. If the rink has 75 cars in total how many yellow cars do they have?
<bot>: How many green cars does the rink have? ** The rink has 12-2= <<12-2=10>>10 green cars.
How many blue cars does the rink have? ** The rink has 10*3= <<10*3=30>>30 blue cars.
How many cars are not yellow? ** The rink has 12+10+30= <<12+10+30=52>>52 cars that are not yellow.
How many yellow cars does the rink have? ** The rink has 75-52= <<75-52=23>>23 yellow cars.
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