1. The problem statement, all variables and given/known data An investor wants to purchase one investment among common stocks, preferred stocks and bonds of six industries located in several countries. The investor can use a full-service broker or a discount broker and can buy with cash or margin. If there are 288 possible choices, how many countries is the investor considering? 2. Relevant equations 3. The attempt at a solution Well there are 6 industries, each industries has a stock or bond to invest in. Then there are 2 broker choices and afterwards, 2 ways to pay. so i used this equation to solve for the amount of countries there were... X*6*2*2*2=288 solved for X which came out to be 6 but it was wrong. Can anyone tell what factors I've missed?