Suppose we form a portfolio consisting of the risk-free T-bill and stock A. The expected return on stock A is 17% and the standard deviation is 20%. The correlation between T-bill and stock A is zero. The standard deviation of the resulting portfolio is 15%. What is the weight in the T-bill? [Hint: Start with the formula for portfolio variance and remember that the two weights must add up to 1]

SET YOUR CALCULATOR TO 2 DECIMAL PLACES AND ROUND YOUR ANSWER TO THE NEAREST WHOLE NUMBER AT THE END. ENTER JUST THE NUMBER WITH NO OTHER SIGN. FOR EXAMPLE IF YOUR ANSWER IS 20.89% ENTER AS 21 ONLY.