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28 Jun 2013, 08:03
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E
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From 2005 to 2006, by what percent did the sales of Company A increase?
(1) In 2005, the sales for Company A were 1/4 of the sales of Company B.
(2) In 2006, the sales for Company A were 3/4 of the sales of Company B.
(1) In 2005, the sales for Company A were 1/4 of the sales of Company B.
(2) In 2006, the sales for Company A were 3/4 of the sales of Company B.
Why isn't it C?
28 Jun 2013, 08:13
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From 2005 to 2006, by what percent did the sales of Company A increase?
\(\frac{S_{2006}-S_{2005}}{S_{2005}}=?\)
(1) In 2005, the sales for Company A were 1/4 of the sales of Company B.
(2) In 2006, the sales for Company A were 3/4 of the sales of Company B.
On their own they are clearly not sufficient.
1+2)From 1 \(S_{2005}=\frac{1}{4}*SB_{2005}\): from 2 \(S_{2006}=\frac{3}{4}*SB_{2006}\)
Re write the equation
\(\frac{0.75*SB_{2006}-0.25*SB_{2005}}{0.25*SB_{2005}}=?\) Still not sufficient
\(\frac{S_{2006}-S_{2005}}{S_{2005}}=?\)
(1) In 2005, the sales for Company A were 1/4 of the sales of Company B.
(2) In 2006, the sales for Company A were 3/4 of the sales of Company B.
On their own they are clearly not sufficient.
1+2)From 1 \(S_{2005}=\frac{1}{4}*SB_{2005}\): from 2 \(S_{2006}=\frac{3}{4}*SB_{2006}\)
Re write the equation
\(\frac{0.75*SB_{2006}-0.25*SB_{2005}}{0.25*SB_{2005}}=?\) Still not sufficient
28 Jun 2013, 08:14
Kudos
Bookmarks
From 2005 to 2006, by what percent did the sales of Company A increase?
(1) In 2005, the sales for Company A were 1/4 of the sales of Company B.
(2) In 2006, the sales for Company A were 3/4 of the sales of Company B.
The answer is straight E. If the sales of Company B in 2005 and 2006, were the same (say $100 and $100), then the increase in sales of Company A would be (75-25)/25*100=200% BUT if the sales of Company B in 2005 and 2006, were NOT the same (say $100 and $200), then the increase in sales of Company A would be different: (150-25)/25*100=500%. Not sufficient.
Answer: E.
Hope it's clear.
(1) In 2005, the sales for Company A were 1/4 of the sales of Company B.
(2) In 2006, the sales for Company A were 3/4 of the sales of Company B.
The answer is straight E. If the sales of Company B in 2005 and 2006, were the same (say $100 and $100), then the increase in sales of Company A would be (75-25)/25*100=200% BUT if the sales of Company B in 2005 and 2006, were NOT the same (say $100 and $200), then the increase in sales of Company A would be different: (150-25)/25*100=500%. Not sufficient.
Answer: E.
Hope it's clear.
