From a survey involving​ 1,000 university​ students, a market research company found that 800 students owned​ laptops, 420 owned​ cars, and 300 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