If 1/4 of the people in a water aerobics class are over age 65 and 1/4 of the people in the class are under age 40 what fraction of the people in the class are either over 65 or onder 40?

How much money does ron have left each month after his fixed expenses? ron graduated from college five years ago. he recently bought a house, but shares it with a housemate who pays him $800 a month for rent and utilities. ron is putting a budget worksheet together so he will have a better idea of where his money is going and where he can save. enlarge