问题
单项选择题
A salesperson works 50 weeks each year and makes an average (arithmetic mean) of 100 sales per week. If each sale is worth an average (arithmetic mean) of $1,000, then what is the total value of sales made by the salesperson in a year ？（）
A.$50，000
B.$100，000
C.$500，000
D.$1，000，000
E.$5，000，000
答案
参考答案：E