An individual has $15,000 invested in a stock with a beta of 0.7 and another $50,000 invested in a stock with a beta of 1.7. If these are the only two investments in her portfolio, what is her portfolio's beta?

Assume that the risk-free rate is 6.5% and the expected return on the market is 12%. What is the required rate of return on a stock with a beta of 0.9?

A stock has a required return of 11%; the risk-free rate is 5%; and the market risk premium is 5%.

1. What is the stock's beta?