og12 ds161

ladyMcc · 发表于 2012-7-21 15:52:51

beginning in january of last year,C made deposits of 120 into his account on the 15th of each month for several consecutive months and then made withdrawals of 50 from the account on the 15th of each of the remaining months of last year.there were no other transactions in the account last year,if the closing balance of C'saccount for May of last year was 2600,what was the range of the monthly closing balances of C's account last year?
1 . last year the closing balance of C's account for April was less than 2625
2 . last year the closing balance of C's account for June was less than 2675
这道题题目就没有明白，看解释就更糊了！求解

key:E

ladyMcc · 发表于 2012-7-21 17:39:44

ladyMcc · 发表于 2012-7-21 21:50:51

ladyMcc · 发表于 2012-7-22 08:30:43

还冇有人愿意帮助我~~~

cherryfans · 发表于 2012-10-29 20:50:22

我也不懂，同求教

og12 ds161

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