Find the expected value, variance and deviation

in exercise 23,24,25,26 find the value variance and standard deviation for the given probability distribution,

25. P(x) 26. X -5000 -2500 300 P(x) 0.008 0.052 0.940 30. Personal Income The probability distribution of the random variable x, the annual income of a family (in thousands of dollars) in a certain section of a large city, is shown in the table. Find E(x) and a. 30 40 50 80 P(x] 0.10 0.20 0.50 0.15 0.05 Review Exercises Chapter 9 (Page 593) Finding Expected Value, Variance, and Standard Deviation In exercise 13, 14, 15, 16, find the expected value, variance, and standard deviation for the given probability distribution. 13. X P(x) 10 10 10 10