Final answer:
The question does not provide enough information to calculate the amount of money Jenny will make if she sells the house herself.
Step-by-step explanation:
To calculate the amount of money Jenny will make if she lists and sells the house herself, we need to know the original purchase price and the current value of the house. Unfortunately, the question does not provide this information. However, if we consider the information given about Freda and Frank's houses, we can see that Freda's house is valued at $250,000 and Frank's house has a value of $160,000 with an outstanding loan of $60,000. Since Jenny's situation is not provided, we cannot determine the exact amount she will make. Therefore, none of the options provided (a) $11,000, (b) $18,000, (c) $20,000, or (d) $28,000 can be considered as the correct amount.