250250250 students in a high school senior class are surveyed about what majors they intend to declare in college. Of the 250250250 students, 100100100 plan to major in mathematics, 808080 plan to major in computer science, and 202020 plan to pursue a double major in mathematics and computer science. Using this information, answer each of the following questions. Let MMM be the event that a randomly selected student plans to major in mathematics and CCC be the event that a randomly selected student plans to major in computer science.
What is P(M)P(M)P, left parenthesis, M, right parenthesis, the probability that a student plans to major in mathematics?
2/5
What is P(C)P(C)P, left parenthesis, C, right parenthesis, the probability that a student plans to major in computer science?
8/25
What is P(M\text{ and }C)P(M and C)P, left parenthesis, M, start text, space, a, n, d, space, end text, C, right parenthesis, the probability that a student has decided to major in mathematics and computer science?
2/25
What is P(M\text{ or }C)P(M or C)P, left parenthesis, M, start text, space, o, r, space, end text, C, right parenthesis, the probability that a student has chosen to major in mathematics or computer science?
18/25