GMAT試験無料問題集「Admission Tests Graduate Management Admission Test 認定」
Using computer models, ecologist Werner Kurtz is able both to weigh the effect of the beetle outbreak by indicating the health the forest would most likely be enjoying today had the beetle population not exploded and to predict the consequences for the forest should beetle population increases continue unabated.
正解:B
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A lottery box contains 8,000 tickets, each of which is red or blue or green. The box contains twice as many blue tickets as red tickets. The number of green tickets is 20 more than the number of red and blue tickets combined. Which of the following Is the best approximation to the probability that the first ticket randomly drawn from the box will be blue?
A)

B)

C)

D)

E)

A)

B)

C)

D)

E)

正解:D
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When fish or mammals ingest the chemical rotenone, enzymes In (he digestive tract metabolize most of it, rendering It harmless, but If enough rotenone enters the bloodstream, It can kill them. Wildlife managers who use rotenone in rivers or lakes to reduce fish populations claim that the practice is harmless to aquatic mammals, but clearly if enough rotenone is used to kill fish, mammals must be at risk too.
Which of the following, if true, most seriously weakens the argument?
Which of the following, if true, most seriously weakens the argument?
正解:C
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A quantity of solution that is 3% salt by volume was mixed with a quantity of solution that is 9% salt by volume to produce a quantity of solution that is 4% salt by volume. How many liters of the 9% solution were used?
(1) The quantity of 3% solution was 5 times the quantity of 9% solution.
(2) The quantity of 4% solution produced was 150 liters.
(1) The quantity of 3% solution was 5 times the quantity of 9% solution.
(2) The quantity of 4% solution produced was 150 liters.
正解:B
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A certain company's yearly revenue was 20% less in 2005 than in 2004 and 10% greater in 2006 than in 2005.
If the company's yearly revenue in 2007 was equal to its yearly revenue In 2004, which of the following is closest to the percent increase in the company's yearly revenue from 2006 to 2007 ?
If the company's yearly revenue in 2007 was equal to its yearly revenue In 2004, which of the following is closest to the percent increase in the company's yearly revenue from 2006 to 2007 ?
正解:D
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