Final answer:
The number of fraternities under the Interfraternity Council varies by institution; there is no one-size-fits-all answer. For unicameral legislature percentage, the correct answer is 25 percent.
Step-by-step explanation:
The number of fraternities under the Interfraternity Council (IFC) varies by university or college. Since the question does not specify a particular institution, it is not possible to provide a definitive answer. Generally, an IFC at a college could have anywhere from fewer than 10 to over 25 member fraternities. If you're referring to a specific university, it would be best to check its official website or contact the campus's Greek Affairs office for the accurate count of IFC fraternities. As for the unrelated question about the percentage of countries with a unicameral legislature, the answer is b. 25 percent according to the provided information.