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Intern
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Joined: 29 Sep 2009
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Average price [#permalink] New post 06 Oct 2009, 23:28
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D
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Q.14/ If 65% laptops A were sold at prices between $200 and $250, 30% laptops B were sold at prices between $450 and $500, 5% laptops C were sold at prices between $3,000 and $3,100. Which of the following could be the average (arithmetic mean) of the prices of all laptops sold?

A/ $240
B/ $320
C/ $410
D/ $440
E/ $510
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Director
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Joined: 04 Jan 2008
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Re: Average price [#permalink] New post 06 Oct 2009, 23:41
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its a Weighted Average

is it D?440

I am getting 441.25

.65(225)+.30(475)+.05(3050)

andrewng wrote:
Q.14/ If 65% laptops A were sold at prices between $200 and $250, 30% laptops B were sold at prices between $450 and $500, 5% laptops C were sold at prices between $3,000 and $3,100. Which of the following could be the average (arithmetic mean) of the prices of all laptops sold?

A/ $240
B/ $320
C/ $410
D/ $440
E/ $510

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Manager
Manager
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Joined: 18 Jul 2009
Posts: 170
Location: India
Schools: South Asian B-schools
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Re: Average price [#permalink] New post 07 Oct 2009, 03:00
good explination nitya38...OA D
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Bhushan S.
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Senior Manager
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Re: Average price [#permalink] New post 07 Oct 2009, 03:25
D
max avg by taking max costs is 467.50.....lly min avg possible is 415...
only value within the range is 440 ,so the ans
Senior Manager
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Re: Average price [#permalink] New post 07 Oct 2009, 09:58
answer should be D.

65*225+30*475+5*3050 = 14625+14250+15250 =44125

44125/100 =441.25 =440
Re: Average price   [#permalink] 07 Oct 2009, 09:58
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