This is only multiple choice. Provide necessary solutions or explainations thank you. follow the numbering

9. Which of the following table DOES NOT represent a probability distribution? A. C. X 0 X 2 6 P(X) NIWN P(X) B. D. X un X P(X) P(X) or numbers 10-12, refer to the probability distribution shown below. X O P(X) bo I w N 10. What is the mean of the probability distribution? A. 1.2 B. 1.5 C. 1.6 D. 1.8 11. What is the variance of the probability distribution? A. 1.25 B.1.00 C. 0.75 D. 0.50 12. What is the standard deviation of the probability distribution? A. V0.50 B. V0.75 C. V1.00 D. V1.25