Sets, Counting & Probability

Problem: Consider the following sets: U = {1,2,3,4,5,6,7,8} A = {2,4,6,8} B = {1,2,3,5,7} Which of the following statements is true? a. A intersection of B is the subset of A b. A intersection of B = 0 c. A is the subset of A intersection of B d. A intersection of B = U

Probability & Statistics

Problem: The test scores of 30 students are listed Below. Find Q3; 31 41 45 48 52 55 56 56 63 65 67 67 69 70 70 74 75 78 79 79 80 81 83 85 85 87 90 92 95 99

Probability & Statistics

Problem: Let X denote the number of boys in a family with four children. Pr(X>3) is: ?

Probability & Statistics

Problem: Your score on three tests are 76,88, and 72. Your grade on the final exam will count twice as much as any one test grade in determining your average grade for the course. In order for your average grade for the course to be 82, your grade on the final exam must be: ? a. 85 b. 87 c. 77 d. 92 e. none of the above

Probability & Statistics

Problem: Suppose the probability that a federal income taz return conatins an arithemetic error is 0.2. If 10 federal income tax returns are selected at random, the probability that fewer than two of them will conatin errors is: