[求助]请教PREP DS的一道题

wangdidiwudi

Beth's bank charges a service fee on a regular checking account for each month in which the balance on the account fallsbelow $100 at any time during the month. Did the bank charge a service fee on Beth's regular checking account last month?

 (1) During last month, a total of $1,000 was withdrawn from Beth's regular checking account.

(2) At the beginning of last month, Beth's regular checking account balance was $500.

怎么遇到这类题目就不太看得懂，请高人指点下

大胖

每月银行月末结完帐，发现如果客户的账户中少于100，那就要当月加收服务费

某客户上月取出1000，那么上月月底时客户账户余额是否有100呢  不知道

上月月初账户有500， 那么上月月底时客户账户余额是否有100呢   不知道

两者合起来考虑 还是无法确定上月月底时客户账户余额大于还是小于100  选E

wangdidiwudi

我理解错了 呵呵，谢谢啦