C. The number of defective sets of headphones in a box of fifty. D. The number of people attending a screening of a new movie. 8. Which of the following data could be represented by a discrete random variable? A. The weights of players on a football team. B. The lengths of fish caught in a fishing tournament. C. The number of children in a family D. The amount of salt found in a can of tomato soup. 9. The following table shows the possible values for a random variable, and the corresponding probabilities that the variable will take on each particular value. What is the expected value of the random variable? X 5 6 7 8 P(x) 0.25 0.35 0.22 0.18 A. 7.23 B. 6.82 C. 7.09 D. 6.33 10. A jar contains 2 yellow and 3 green marbles. Two marbles are drawn. If equals the X number of green marbles drawn, what is the expected value of X? A. 1 B. 2 C. 1.5 D. 1.2 1. Evaluate when and A. B. C. D. No solution 2. Evaluate when and A. B. C. D. No solution 3. Evaluate when and and A. B. C. D. No solution 4. Evaluate when and and A. B. C. D. No solution
C. The number of defective sets of headphones in a box of fifty. D. The number of people attending a screening of a new movie. 8. Which of the following data could be represented by a discrete random variable? A. The weights of players on a football team. B. The lengths of fish caught in a fishing tournament. C. The number of children in a family D. The amount of salt found in a can of tomato soup. X 5 6 7 8 P(x) 0.25 0.35 0.22 0.18 9. The following table shows the possible values for a random variable, and the corresponding probabilities that the variable will take on each particular value. What is the expected value of the random variable? A. 7.23 B. 6.82 C. 7.09 D. 6.33 10. A jar contains 2 yellow and 3 green marbles. Two marbles are drawn. If X equals the number of green marbles drawn, what is the expected value of X? A. 1 B. 2 C. 1.5 D. 1.2 1. Evaluate when and A. B. C. D. No solution 2. Evaluate when and A. B. C. D. No solution 3. Evaluate when and and A. B. C. D. No solution 4. Evaluate when and and A. B. C. D. No solution
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