Can anyone solve this problem for me plz

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Junior | Next Rank: 30 Posts
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Can anyone solve this problem for me plz

by dabulaila » Sat Aug 18, 2007 2:49 am
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
Source: — Problem Solving |

Junior | Next Rank: 30 Posts
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Joined: Fri May 04, 2007 3:51 am

by krishnamurthyu » Sat Aug 18, 2007 3:48 am
Given:
Aa,Am,Aj=(1.26,1.20,1.080 )
Sa=Sm
Sj=2Sa

Total Sales=Sa+Sm+Sj
=Sa+Sa+2Sa
=4Sa

3-Month Avg=Sales Price*Sale/Total Sales
=(Sa*Aa + Sm * Am + Sj * Aj) / ( Sa + Sm + Sj)
= (Sa * Aa + Sa * Am + 2Sa * Aj ) / 4Sa
=Sa (Aa+Am+2Aj)/4 (Sa)
= (Aa+Am+2Aj)/4
=(1.26+1.20+2*1.080)/4
=1.155
~=1.16 = D.

Junior | Next Rank: 30 Posts
Posts: 21
Joined: Fri Feb 23, 2007 8:05 pm

by dabulaila » Tue Aug 21, 2007 12:12 am
thanks alot for help