Answer:
The average value of a used car is $9000.
Step-by-step explanation:
Because there are equal numbers of good and bad used cars in the market, the likelihood of both the type is 0.50:
The average value of a used car equals
= 0.5*$13,000 + 0.5*$5,000
= $9000
Therefore, The average value of a used car is $9000.