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Question from 1000 PS

Expert replies
by agni_h1 » Sat Aug 28, 2010 10:44 pm
Month Average Price
per Dozen
April $1.26
May $1.20
June $1.08

19. The table above shows the average (arithmetic mean) price per dozen of the large grade A eggs sold in a certain store during three successive months. If as many dozen were sold in April as in May, and twice as many were sold in June as in April, what was the average price per dozen of the eggs sold over the three-month period?
(A) $1.08
(B) $1.10
(C) $1.14
(D) $1.16
(E) $1.18
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Source: — Problem Solving |

by limestone » Sat Aug 28, 2010 11:52 pm
Let's use plug -in strategy here. If in April, one dozen was sold, then in May : 1 dozen and in June : 2 dozens
Total dozens sold: 4
Average price: (1.26*1 + 1.2*1 + 1.08*2)/4 = 1.16
So the answer is D
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by sirisha.g » Sat Aug 28, 2010 11:54 pm
IMO D.
(1.08*2+1.26+1.2)/(2+1+1)=1.155=1.16
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by Rahul@gurome » Sun Aug 29, 2010 12:12 am
Solution:
Let the number of dozens of egg sold in May be x.
So the total price of x dozen eggs sold in May is 1.2x.
Also number of dozens of eggs sold in April is x.
So the total price of x dozen eggs sold in April is 1.26x.
The number of dozen of eggs sold in June is 2x.
So the total price of 2x dozen eggs sold in June is 2x*1.08 = 2.16x.
Or the average price per dozen of the eggs sold over 3 month period is $(1.2x+1.26x+2.16x)/(x+x+2x) = $4.62x/4x = $1.155 = $1.16.

The correct answer is (D).
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by diebeatsthegmat » Sun Aug 29, 2010 9:47 am
agni_h1 wrote:Month Average Price
per Dozen
April $1.26
May $1.20
June $1.08

19. The table above shows the average (arithmetic mean) price per dozen of the large grade A eggs sold in a certain store during three successive months. If as many dozen were sold in April as in May, and twice as many were sold in June as in April, what was the average price per dozen of the eggs sold over the three-month period?
(A) $1.08
(B) $1.10
(C) $1.14
(D) $1.16
(E) $1.18
the average=1.26*1+1.2*1+1.08*2=4.62/4=1.155=1.16
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by asbhat » Sun Aug 29, 2010 10:09 am
1.16 OA?
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