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The level of salt concentration in Lake A increased by 20%

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CEO
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The level of salt concentration in Lake A increased by 20% [#permalink] New post 18 Oct 2007, 06:24
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The level of salt concentration in Lake A increased by 20% from 1900 to 2000 while that in Lake B decreased by 10%.

Is the current level of salt concetration in Lake A higher than Lake B?


1. In 1900, the level of salt concentration in Lake B was 10% higher than that in Lake A
2. In 1900, the level of salt concentration in Lake B was 4%
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 [#permalink] New post 18 Oct 2007, 06:33
Hi
STMNT 1
year 1900 lake B=1,1lakeA
year 2000-lake A =1,2 Lake A 1900
year 2000-lake B=0,99 Lake A 1900
so A is SUFF
Stmnt 2 -Insuff
  [#permalink] 18 Oct 2007, 06:33
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The level of salt concentration in Lake A increased by 20%

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