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Q: Combined Life Expectancy of a couple. ( No Answer,   2 Comments )
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 Subject: Combined Life Expectancy of a couple. Category: Business and Money > Economics Asked by: fangel-ga List Price: \$20.00 Posted: 26 Nov 2006 13:15 PST Expires: 26 Dec 2006 13:15 PST Question ID: 785732
 ```I would like to determine how to calculate the combined life expectancy of a married couple. If person A has a life expectancy of 8 years and person B has a life expectancy of 5 years, what would be the combined life expectancy? At the end of each year what would be the probability that neither individual would still be alive? I liken this to rolling two dice with varying number of sides. If one die had eight sides and one had 5 sides, how many rolls would it take to eventually roll a one on each die? What would be a formula for determining this based on different scenarios?``` Request for Question Clarification by omnivorous-ga on 27 Nov 2006 13:59 PST ```Fangel -- The example of a married couple doesn't work quite like a dice roll, as the probability of both not living has a covariance. The formula would be simple -- P(A not living) * P (B not living) - Covariance (P (AB) not living). But the calculation of the covariance will require actuarial tables. Actuarial studies have shown that "married people have lower death rates than those who are not married AND the differentials are increasing." A researcher could help find the actuarial data to calculate life expectancies for the range that you seek. Best regards, Omnivorous-GA```
 `Actually, men live longer married and women live shorter lives when married`
 ```Ubiquity -- For people of pre-retirement ages you are correct. For those who are retired, being married extends the life expectancy of both parties. Best regards, Omnivorous-GA```