a discrepancy in the notes. afternoon, decrease, increase, question, friends

lanpy

hi friends, i noticed a discrepancy in the notes.  anybody can help clarify?  thanks

in Notes Book 2, Page 102, Answer of question 1,  it says "savings rates decrease as population age"

however,  in Book 6 (sample Exam 2, afternoon)  question 120, the answer says "savings rates increase as population age".

which one is correct?

shopboy

savings rates decrease as population age