Question 1117932
a. (4/21)(3/20)(2/19)=0.0030
b. (17/21)(16/20)(15/19)=0.5113
c.  At least one is 1-probability of none or 1-0.5113=0.4887
They are dependent in that once I pick a home, it changes the probability for the second choice to a conditional probability.