Carrie is not correct, her pie chart presents 36-60yrs old to be 1/5
1) The key to tackling this question is to think of a circle and each sector must be proportional to its area.
2) Given those percentages, we can state that Carrie is not correct for a quarter means this:

Because the pie chart described in the text presents 1/5 for 36-60yrs old, not a quarter.