I Would Like to Know My Chances of Surviving to See

Multiple Choice

I would like to know my chances of surviving to see my son's high-school graduation.I need to live another twelve years, of course, and my son has to live that long as well-and he also has to graduate! What formula would I use to calculate my chances?

A) the addition theorem for mutually exclusive alternatives
B) the addition theorem for nonexclusive alternatives
C) the general product theorem for the joint occurrence of independent events
D) the general product theorem for the joint occurrence of dependent events