a. A group of 50 FY students were asked what they did on the weekends. A total of 30 said they went to the beach, the movies or both. Of the 20 who went to the beach, 6 said they also went to movies. A student is selected at random from the group Fill in the probability table to represent this information, where M represents going to the movies, and B represents going to the beach. [Give your answer as exact fractions]