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Senior Manager
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A certain company's customer service department has five [#permalink]
 16 Jan 2004, 10:40
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A certain company's customer service department has five employees. The hourly wage for each employee ranges from $5 an hour to $20 an hour.
Which of the following could be the average (arithmetic mean) hourly wage
for the customer service employees?
1) $7.50 an hour
2) $9 an hour
3) $16.75 an hour
A. 1 only
B. 2 only
C. 3 only
D. 1 and 2 only
E. 2 and 3 only
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shubhangi
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I wouls say none of the above !
Because some of the wages have to be in fractional cents?
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Manager
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E
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stoolfi Posted:
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I wouls say none of the above !
Because some of the wages have to be in fractional cents?
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Why not?
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Director
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mantha-- I was copying kpadma's statement, and offering a guess at how he came up with his/her answer.
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GMAT Club Legend
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E. We know that the range is from 5 to 20 for the 5 employees. Therefore, the total of the salaries combined should be between:
4*5 + 20 = 40
and
5 + 20*4 = 85
Of choices given:
1) 5*7.5 = 37.5 --> out of range
2) 5*9 = 45 --> good
3) 5*16.75 = 83.75 --> good
Only 2 and 3 are possible, therefore E
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Paul
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Senior Manager
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4*5 + 20 = 40
and
5 + 20*4 = 85
how did u get this part?
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shubhangi
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We are trying to find the range of the total salaries. If the salaries were between 5 and 20 inclusive, then we try to find the extreme values. Therefore, I assumed 2 scenarios.
1- 4 employees are paid the maximum (20$) and there is one who is paid 5$ --> 5 + 20*4 = 85
2- 4 employees are paid the minimum (5$) and there is one who is paid 20$ --> 4*5 + 20 = 40
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Paul
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thanks paul..understood 
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shubhangi
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Shouldnt the range be
5*5 = 25
5*20 = 100
Why doesnt 1 work?
If all 5 employees earn $7.50, then isnt the avg $7.50?
What am i not seeing? 
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Quote: The hourly wage for each employee ranges from $5 an hour to $20 an hour.
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Best Regards,
Paul
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Sorry Paul...maybe all the studying is making me stupid but I dont see it.
How can you get 40 as a min? If the 5 employees each earn $5/hr then together they earn 25/hr. Right?
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All 5 cannot earn 5$. At least one has to earn 20$ because it is stated that that range of salaries is 5 to 20$.
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Paul
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DOH!!!
I see. Thanks 
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