How do you calculate the probability for this question that I am so confused about?

A survey of undergraduate students in the School of Business at Northern University revealed the following regarding the gender and majors of the students: Major Gender Accounting Marketing Finance Total Male 90 130 30 250 Female 90 30 50 170 Total 180 160 80 420 a. What is the probability of selecting a female student? (Round the final answer to 2 decimal places.) Probability b. What is the probability of selecting a finance or an accounting major? (Round the final answer to 2 decimal places.) Probability c-1. What is the probability of selecting a female or an accounting major? (Round the final answer to 2 decimal places.) Probability c-2. Which rule of addition did you apply? (Click to select d. What is the probability of selecting an accounting major, given that the person selected is a male? (Round the final answer to 2 decimal places.) Probability e. Suppose two students are selected randomly to attend a lunch with the president of the university. What is the probability that both of those selected are accounting majors? (Round the final answer to 4 decimal places.) Probability