扫描二维码，直接登录
题库 / Prep2007E2-PS-183
A certain company had an annual profit of $15 million in 1998 and an annual profit of $20 million in 1999. In 2000 the company had an annual loss of $5 million. What was the company's average (arithmetic mean) annual profit for the 3 years?
$5million
$10million
$13million
$20million
$25million
还没有题目讲解（毕出老师会陆续发布对官方考题的解读，请保持关注）。