A state unemployment rate is 6.0% among those with no qualification, 4.5% among those with qualifications only at school level, and 2.1% among those with tertiary qualifications, including university degrees.

For each of the following questions, give the name of the formula or theorem you would use, and say what additional information (if any) you would need to be able to calculate the answer.

a. What is the overall unemployment rate in the state?

ercises 617

b. What is the probability that an unemployed person has a tertiary qualification?

c. What proportion of the population are unemployed tertiary graduates?