Can someone explain what the actual representation of the solution would be?
I think it is asking P(D/C) which should be:
P(D/C) = P(C/D).P(D)/(P(C/D).P(D) + P(C/not_D).P(not_D))

However, I am not getting any of the options. D = Disease present, C = Correct Result in Test.

Which quiz and question are you asking about specifically?
Do not use the question number, because the quizzes are randomly ordered.
Please give the title of the quiz, and the text of the question.