I don't understand how to calculate the optimum strategy as looking through some of the uploaded documents for further assistance the way that the final answer is concluded isn't explained and I'm not able to find anything that explains how the answer was derived. This is one of the answers that was uploaded and the final answer of 2/5 doesn't make sense as there isn't any indication within the problem or the answer how they arrived at the fraction or what was divided to give the percentage of 40% the 2/5 also represents EC = -24p +18(1 - p) = -24p + 18 - 18p = -42 + 18 ER = 12p - 6(1-p) = 12p - 6 +6p = 18p - 6 Solve for p by setting these expected values equal to each other: -42 + 18 = 18p - 6 18 = 60p - 6 24 = 60p P = 2/5