SOLUTION: The variable X takes the values 0, 1 and 5 according to the following distribution: x 0 1 5 P(X=x) 0.2 k k a) determine the constant k b) find E(X), the expected value of

Algebra ->  Probability-and-statistics -> SOLUTION: The variable X takes the values 0, 1 and 5 according to the following distribution: x 0 1 5 P(X=x) 0.2 k k a) determine the constant k b) find E(X), the expected value of      Log On


   

Question 1161233: The variable X takes the values 0, 1 and 5 according to the following distribution:
x 0 1 5
P(X=x) 0.2 k k

a) determine the constant k
b) find E(X), the expected value of X
c) Find Var (X), the variance of X


Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


The sum of all the probabilities must be 1, so 2k = 0.8


John

My calculator said it, I believe it, that settles it