I need help answering all these questions!

From a survey involving 1,000 university students, a market research company found that 730 students owned laptops, 470 owned cars, and 320 owned cars and laptops. If a university student is selected at random, what is each (empirical) probability? (A) The student owns either a car or a laptop (B) The student owns neither a car nor a laptop (A) The (empirical) probability that the student owns either a car or a laptop is (Type an integer or a decimal.) (B) The (empirical) probability that the student owns neither a car nor a laptop is (Type an integer or a decimal.)