HKD1710 wrote:
How many papers can Bill and Tim proofread in 60 minutes if they are working together?
(1) Bill can proofread twice as many papers as Tim in the same time period.
(2) Tim can proofread 30 fewer papers than Bill in 60 minutes.
Let Bill read\(x\) papers and Tim\(y\) in\(60\) minutes
Statement 1 : implies \(x=2y\) . two variable, one equation henceinsufficient
Statement 2 implies\(x=y+30\) . two variable, one equation henceinsufficient
Combining 1 & 2 we have two variable and two linear equations. Hence
...
![Mumford & Sons – Blind Leading the Blind – Single [iTunes Plus M4A]](http://is1-ssl.mzstatic.com/image/thumb/Music124/v4/49/c3/83/49c38304-45c6-20d0-c6df-3b36ea8bd92a/19UMGIM89194.rgb.jpg/316x316bb.webp)
