A listing of the balances in the accounts receivable master file at the balance sheet date, including individual customer balances outstanding and a breakdown of each balance by the time passed between the date of the sale and the balance sheet date, is the

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(b); ; ; the quantitative or qualitative variable for which the experimenter wishes to determine how its value is affected by the explanatory variable;