英语翻译amy:how did we do in the test,miss woo?miss woo:the numb

英语翻译
amy:how did we do in the test,miss woo?
miss woo:the number of students who got 90 marks or above is the same as the number of students who got 80 marks or above.
billy:how many students got 80 marks or above?
miss woo:the number of tsudents who got 80 marks or above is the same ass the number of students who got 70 marks or above.
carol:hew many students falied the test,miss woo?
miss woo:the number of students who failed the test is the same as the number of students falied the test is the same as the number of students in this class.
how many students got more than 90 marks?
(我不要百度的翻译,那个太难懂了.）

AMY：MISS WOO,这次我们的考试怎么样啊?
MISS WOO： 考90分以上和考80分以上的人数一样多
BILLY：那有多少人考80分以上啊?
MISS WOO：考80分以上的人跟考70分以上的人数一样多
CAROL: MISS WOO, 那有多少人不及格啊?
MISS WOO： 不及格的人数跟咱们班的人数一样多.
问题：有多少个人达不到90分的?
再问： 那个问题的答案是什么？
再答： 没人咯
再问： 昂，我懂了。。