要向大家求救啊！！读不懂@

nardolau · 发表于 2011-5-3 15:02:05

161. Beginning in January of last year, Carl 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 Carl’s account for May of last year
was $2,600, what was the range of the monthly
closing balances of Carl’s account last year?
(1) Last year the closing balance of Carl’s account
for April was less than $2,625.
(2) Last year the closing balance of Carl’s account
for June was less than $2,675.

jianglindenise · 发表于 2011-7-1 18:10:19

http://forum.chasedream.com/GMAT_Math/thread-543968-1-1.html

看这个帖子～～

要向大家求救啊！！读不懂@

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