A sample of adults in a suburb was surveyed about their current employment status and their level of education. The results are summarised in the table below.
Employed
Unemployed
Attended university
225
7
Did not attend university
197
18
a. Estimate the probability that the next randomly chosen adult:
i attended university ii did not attend university and is currently employed
iii is unemployed iv is unemployed *or* attended university.
b. A randomly chosen adult is found to be unemployed. Estimate the probability that he or she attended university.