Calculate E(XY). What will be an ideal ...

[clmills979]

Calculate E(XY).
 
  What will be an ideal response?

Question 2

The probability that a person has an Internet connection at home is 34. The probability that they have access to the Internet at work is 40. The probability that a person who has access to the Internet at work also has access at home is 55.
 
  What is the probability that a person with an Internet connection at home also has one at work?

[fur]

Answer to Question 1

E(XY) = 2.55

Answer to Question 2

H = Internet at home
W = Internet at work
P(H) = 0.34, P(W) = 0.40, P(H/W) = 0.55.
Hence, P(H  W)=P(H/W)  P(W) = (0.55 )(0.40 ) = 0.22 and P(W/H) = P(W  H)/P(H) = 0.22/0.34 = 0.647.