I believe this is based on the idea that human capital is the PV of the earnings over the accumulation stage. Since she is young, there is a longer timeline for her to accumulate this capital therefore her human capital is high relative to her stated financial capital human + financial = total capital. While there is no real number here since earnings or discount rate are not given, I think it is one they want you to assume. If she was older human capital would be smaller calculated by PV based on remaining years. This isnt a perfect answer or question, but I believe it is what they are referencing. See pg 369 summary and pg 389 question 6 in book 2, they say opposite things but I think this is a reasonable take away.