Looking at the solution for Q 9 (James Stephenson / Surgeon) in SS 3 , Reading 15 (CFAI text), it ASSUMES a real return of 4 % to arrive at the future value of portfolio after 15 years. Is this is standard or normal assumption to make? How did you all answer that question before looking at the solution ? What assumptions are safe to make in the exam ? Any insights will be appreciated! Thanks.
errata
Errata ? Sorry , but I did not find anything there. What am I missing here ? 
posted on CFAI website…that whole paragraph “to maintain his lifestyle…” should be taken out.
Ahhh ! Thanks so much !! That’s right. My bad - For some reason I was associating this as SS 3 and was looking at SS 3 (even in m post above I have mentioned SS 3 )… Whatever is happening to me ???