You have been given this probability distribution for the holding-period return for a stock: What is the expected standard deviation for the stock? 15.346% 7.429% 12.167% 22.136% 18.274%

there's 11 people for the 1st position. then, no matter who gets it, there's only 10 left for the second, and then 9 left for the third. 11 x 10 x 9 = 990.   the answer is there are 990 different ways the positions can be filled by these applicants

answer; rapid growth in buyer demand and high buyer switching cost;

consumer credit. an advantage is that it allows consumers to afford expensive goods and services now, increasing their standard of living. however, a disadvantage is that it creates a trap for debt, if people do not have self control, they may see themselves filing personal bankruptcy.