Probability help/ Homework help

Question

assume that the probability density function for the random variable X is the one given in the table below:
Value of X         Probability
   1                          0.1
   5                          0.2
   7                          0.7
What is the expected value of X?

Answer 1

Morgan,

 

Expected value is the sum individual values after they are multiplied by their probability of occurrence or their weight of you will.

 

Expected Value = 1(0.1) + 5(0.2) + 7(0.7) = 0.1 + 1.0 + 4.9 =  6  

 

I hope this helps