回复：回复：回复：回复：I think it is answer.

来源: 于 2010-06-18 19:44:07 [旧帖] [给我悄悄话] 本文已被阅读：次

If you want to all pump are good,the answer is 2.5.
If you only want to get water,2*1/32 +1*12/32=14/32=7/16.