We can use the Capital Asset Pricing Model (CAPM) to calculate the market risk premium (MRP). The formula for CAPM is:
r_a = r_f + β_a (r_m - r_f)
Where:
r_a = expected return on asset a
r_f = risk-free rate
β_a = beta of asset a
r_m = expected return on the market
Rearranging this formula, we can solve for the market risk premium:
r_m - r_f = (r_a - r_f) / β_a
Plugging in the values given in the problem, we get:
r_a = 17.2%
β_a = 1.80
r_f = 2.4%
r_m - r_f = (r_a - r_f) / β_a
r_m - 2.4% = (17.2% - 2.4%) / 1.80
r_m - 2.4% = 8.44%
Adding 2.4% to both sides, we get:
r_m = 10.84%
Therefore, the market risk premium is 8.44%, rounded to 2 decimal places.