Hi Strongboy - it's OK, it should be there! It's integrating from time 20 upwards, which is the point at which premiums cease. On death from healthy, after that time, they will still get the return of all premiums paid by then (as a lump sum), which is 20 years of 1000 a year, ie 20,000. (This confused me the first time I looked at it until I realised that the limits were 20 to infinity, not 0 to 20 as in the first integral).
Good luck with the exam!
Last edited by a moderator: Sep 28, 2010
