Statistics South Africa reported the number of people employed by sector in a given year as follows (in thousands): 6 678 in the formal business sector (excluding agriculture); 1 492 in the commercial agricultural sector; 653 in subsistence agriculture; 2 865 in the informal business sector; and 914 in the domestic service sector.

(a) Construct a percentage frequency distribution of employment by sector.

(b) What is the probability that a randomly selected employed person works in the domestic service sector?

(c) If an employed person is selected at random from the workforce, what is the likelihood that the person earns a living through agriculture?

(d) If a person is known to work in the business sector (both formal and informal), what is the likelihood that the person is an informal trader?

(e) Name the probability types or rules used in questions (b), (c) and (d).