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[转帖]8.1 USA JJ

USA, Aug 1st, 730

Q: 50, V: 41, Total: 730

A1.

People are not as concerned today as before about their intake of red meat and fatty cheese...The healthy food store is selling several items of cheese...the vegeteran restaurant has not been making good revenue...while the owner of the beef store right across the street is millionare...--sorry, can't remember very well, but it is basically the same.

A2.

The success of a company is primarily dependent on the employees' satisfaction of the work and the job security.

Q:

Not that easy, harder than the GWD 31. Did not even have enough time.

#. A can do a 0.5 job, B can do a 0.8 job. If A and B both do the job together, the finished job is 0.75. What is the fraction that B did?

Answer: 5/6             let the fraction A did =x, the fraction B did =y; x+y=1, x*0.5+y*0.8=0.75; y=5/6

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