210 college students were asked in a survey if they preferred windows or mac brand computers . 90 students claimed that they preferred mac to windows brand computers . one third as many of the students who preferred mac to windows , equally preferred both brands . 60 of the students had no preference . how many of the students in the survey preferred windows to mac brand computers ?
"210 = 90 ( mac ) + x ( window ) + 60 ( both ) = > x = 60 answer : d"
subtract(subtract(subtract(210, 60), 90), divide(subtract(subtract(210, 60), 90), const_3))