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A person is randomly drawn from a large population and then given an aptitude test. If someone passes the test, then there is an 80% chance they graduated from the University of Chicago. For those who did not pass the test, there is a 10% chance they graduated from the University of Chicago. Only 1% of the overall population passes the aptitude test, and 89.3% of the population did not graduate from the University of Chicago. What is the probability that someone who did not graduate from the University of Chicago passes the aptitude test?

What can you conclude about the expected return of your portfolio?

Questions 9-10 are grouped together and depend on the information below. Your portfolio contains shares of two stocks A and B. You know the variances of the returns of A and B.

Biologists are especially concerned with genetic diversity, while geographers are more interested in biogeographic diversity.

If a country follows the rank-size rule, if the largest city has 1,000,000 inhabitants, how many people live in the fifth largest city?

Rapid urbanization continues today in the more developed countries.

Fossil fuels are

Which of the following is not a major source of water pollution?

The leading forms of energy of renewable energy used in the world (in both more developed and less developed countries) today are

Between 1995 and 20017 growth in employment in the United States has come from the Primary and Secondary sectors, while the tertiary sector has declined