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GMAT Avengers Study Group Practice Question 1

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by helen.xia@mbawatch » Sat Oct 26, 2013 7:33 am
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The average of 5 different numbers is 14. What is the average of the 3 largest numbers?

1) The average of the two smallest numbers is 5
2) The average of the two smallest numbers is ¼ of the average of the 3 largest numbers
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Source: — Data Sufficiency |
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by theCodeToGMAT » Sat Oct 26, 2013 7:54 am
Is it [spoiler]{D}[/spoiler]?

a + b + c + d + e = 14x5 --(1)

To find: (c+d+e)/3

Statement 1: (a+b) = 5x2
10 + c + d + e = 70
c+d+e = 60
Average = 60/3= 20
SUFFICIENT

Statement 2:
(a+b)/2 = (c+d+e)/3*4
(a+b) = (c+d+e)/6
Substitute in (1)
SUFFICIENT

Answer [spoiler]{D}[/spoiler]
R A H U L
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