Question 1)

Given the following confusion matrix where the column labelled "C" indicates subjects who have a condition or characteristic and the column heading "Not C" corresponds to those subjects without the condition or characteristic and where the row labelled "D" indicates the corresponding numbers of subjects for which some detection of the condition or characteristic occurs and the row marked "Not D" indicates subjects for which the condition or characteristic was not detected, indicate the estimated probability that a person has the condition if they've been told they tested positive for it.