1.Suppose a point is to be selected at random from the unit circle.Write the sample space associated with this random experiment.

2.In a certain residential suburb of households, use the TV, the newspaper, and the Internet to get their news.If families use both the TV and the newspaper, both the Internet and the newspaper, the TV and the Internet, and use all three, what proportion of households use exactly one source to get their news?

3.Suppose the number of ways of selecting items from a group when order is important is .What would this number be if the order was not important?