statistics probability matrix

Five classes were surveyed, totaling 150 students. They were asked their home county and their major. The counties are broken down as follows: C1-Ocean C2-Monmouth C3-Middlesex. The majors are broken down as follows: M1-Accounting M2-Business M3-Marketing M4-Economics. All are mutually exclusive of each other. M1 M4 1 C1 C2 C3 M2 M3 12 21 23 15 47 42 83 27 0 3 150 A. Complete the probability matrix shown above. B. If a student is chosen at random from the sample, what are the following probabilities? (Show numerator / denominator and resulting probability value.) 1. P(M2 n C1)? 2. P(C2n C1)? 3. P(M3 U C2 or both)? 4. P(M1/C3)? 5. P(C3 / M1)? 6. P(M2 / C1)? 7. P(C2/M3)