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Difficulty:
45%
(medium)
Question Stats:
65% (02:00) correct
35%
(01:57)
wrong
based on 639
sessions
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In 1980, 13% of the Arbican population moved from urban areas to suburban areas. This percentage steadily declined, until, in 1990, it reached 3%.
If the statements above are true, all of the following statements concerning Arbicans between 1980 and 1990 could also be true EXCEPT:
A. The number of Arbicans moving from suburban areas to urban areas also decreased.
B. The Arbican population increased, and so did the number of Arbicans moving from urban to suburban areas.
C. The Arbican population decreased, and so did the number of Arbicans moving from urban to suburban areas.
D. The Arbican population decreased, and the number of Arbicans moving from urban to suburban areas remained the same.
E. The Arbican population increased, and the number of Arbicans moving from urban to suburban areas remained the same.
If the statements above are true, all of the following statements concerning Arbicans between 1980 and 1990 could also be true EXCEPT:
A. The number of Arbicans moving from suburban areas to urban areas also decreased.
B. The Arbican population increased, and so did the number of Arbicans moving from urban to suburban areas.
C. The Arbican population decreased, and so did the number of Arbicans moving from urban to suburban areas.
D. The Arbican population decreased, and the number of Arbicans moving from urban to suburban areas remained the same.
E. The Arbican population increased, and the number of Arbicans moving from urban to suburban areas remained the same.
08 Jan 2022, 07:00
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Official Explanation
Conclusion: We need to find the answer choice that is not possible, something that could not be true based on the evidence. This means the four wrong answers will be possible based on the evidence.
Evidence: 13% of Arbicans moved from urban to suburban areas in 1980, and this percentage fell steadily until it was down to 3% in 1990.
We are not given any information about the number or percentage of Arbicans moving from suburban to urban areas, so (A) definitely could be true. That the population increased, along with the number moving, (B), is also possible. The population and the number moving decreasing (C), is fine. And if the population is increasing while the number moving stays the same (E), the percentage would have to dip as we were told.
Answer choice (D) however, clearly contradicts the given information, since we know the percentage of Arbicans moving from urban to suburban areas has decreased, and if the population has also decreased, then the number of Arbicans moving from urban to suburban areas must also have decreased. So (D) is the correct answer.
General Discussion
03 Jan 2022, 13:02
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In 1980 - Out of every 100 Arbican, 13 moved from urban areas to suburban areas.
In 1990- Out of every 100 Arbican, 03 moved from urban areas to suburban areas.
Pre-thinking
Let's assume that at any point the number of Arbicans moving from suburban areas to urban areas is 'x and the total population at that time is 'y'
% = (x / y) * 100
A. The number of Arbicans moving from suburban areas to urban areas also decreased.
Can be true, lets say in 1990 only 3 people moved
B. The Arbican population increased, and so did the number of Arbicans moving from urban to suburban areas.
If y increased and x increase the percentage can decrease. Hence, may be true.
C. The Arbican population decreased, and so did the number of Arbicans moving from urban to suburban areas.
If y decreased and x decreased the percentage can decrease. Hence, may be true.
D. The Arbican population decreased, and the number of Arbicans moving from urban to suburban areas remained the same.
If y decreases and the percentage decreases, then x cannot remain same. It has to decrease.
E. The Arbican population increased, and the number of Arbicans moving from urban to suburban areas remained the same.
If x remains same and y increases, percentage will decrease. Hence may be true.
In 1990- Out of every 100 Arbican, 03 moved from urban areas to suburban areas.
Pre-thinking
Let's assume that at any point the number of Arbicans moving from suburban areas to urban areas is 'x and the total population at that time is 'y'
% = (x / y) * 100
A. The number of Arbicans moving from suburban areas to urban areas also decreased.
Can be true, lets say in 1990 only 3 people moved
B. The Arbican population increased, and so did the number of Arbicans moving from urban to suburban areas.
If y increased and x increase the percentage can decrease. Hence, may be true.
C. The Arbican population decreased, and so did the number of Arbicans moving from urban to suburban areas.
If y decreased and x decreased the percentage can decrease. Hence, may be true.
D. The Arbican population decreased, and the number of Arbicans moving from urban to suburban areas remained the same.
If y decreases and the percentage decreases, then x cannot remain same. It has to decrease.
E. The Arbican population increased, and the number of Arbicans moving from urban to suburban areas remained the same.
If x remains same and y increases, percentage will decrease. Hence may be true.
