hired by a firm to get legal, though not necessarily ethical, information about competitive firms. hired by a firm's management to prove to the courts that competitors are using unfair pricing practices. hired by a customer to report on illegal or unethical practices that are regularly taking place at a particular establishment. who pose as customers to check on availability and pricing of a firm's products or services and on the quality of the customer service. hired by law firms to check on the safety of their clients' products and the credibility of their advertising

 who pose as customers to check on availability and pricing of a firm's products or services and on the quality of the customer service.

Explanation:

Mystery shoppers are hired by a company as a form of self-evaluation in order to check things like the availability of goods and services as well as the quality of their customer service. They also check to see if their employees are sticking to the codes of conduct of both the company and the regulatory bodies.

Mystery shoppers can also be hired by a company to check out the affairs of another company the same way they would the company hiring them. They would then be paid for their services.

its high unemployment figures

i just had a test with that question

there's 11 people for the 1st position. then, no matter who gets it, there's only 10 left for the second, and then 9 left for the third. 11 x 10 x 9 = 990.   the answer is there are 990 different ways the positions can be filled by these applicants