Two thousand randomly selected adults were asked whether or not they have ever shopped on the internet. the following table gives a two-way classification of the responses. male female have shopped have never shopped 500 300 700 500 suppose one adult is selected at random from these 2000 adults. find the following probabilities. a. p(has never shopped on the internet or is a female) b. p(is a male or has shopped on the internet) c. p(has shopped on the internet or has never shopped on the internet)