Suppose that many stocks are traded in the market and that it is possible to borrow at the risk-free rate, r. The characteristics of two of the stocks are as follows:

Stock	Expected Return			Standard Deviation
A		10	%		25	%
B		18	%		75	%
Correlation = 1

a. Calculate the expected rate of return on this risk-free portfolio? (Hint: Can a particular stock portfolio be substituted for the risk-free asset?) (Round your answer to 2 decimal places.)

Rate of return = __________________%