推 hatepig:10%*the motorists = 80%*the motorists who exceed 03/23 23:47
→ hatepig:移項一下 就知道囉 10%/80%.... 03/23 23:48
→ scont:謝謝你~ 03/23 23:50
推 hatepig:我10分鐘前剛好做到這題耶 真巧 呵呵~~~ 03/23 23:52
On a certain road,10 percent of the motorists exceed the posted speed limit
and receive speeding tickets,but 20 percent of the motorists who exceed the
posted speed limit do not receive speeding tickets.What percent of the
motorists on that road the posted speed limit?
(A)10.5%
(B)12.5%
(C)15%
(D)22%
(E)30%
ANS:(B)
感謝回答~
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