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Random Investor and Security Ownership

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It is estimated 30% of all adults in United States invest in stocks and that 83% of U.S. adults have investments in fixed income instruments (savings accounts, bonds, etc.). It is also estimated that 25% of U.S. adults have investments in both stocks and fixed income instruments.

(a) What is the probability that a randomly chosen U.S. adult invests in stocks, given that s/he invests in fixed income instruments?

(b) What is the probability that a randomly chosen stock investor also invests in fixed income instruments?

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Solution Summary

The full solution includes details on how to apply Bayes Law to solve these problems.

Solution Preview

Recall that to calculate conditional probability, we simply need to use ...

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