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Ditrama is a federation made up of three autonomous regions: Korva, Mitro, and Guadar. Under the federal revenue-sharing plan, each region receives a share of federal revenues equal to the share of the total population of Ditrama residing in that region, as shown by a yearly population survey. Last year, the percentage of federal revenues Korva received for its share decreased somewhat even though the population survey on which the revenue-sharing was based showed that Korva's population had increased.

If the statements above are true, which one of the following must also have been shown by the population survey on which last year's revenue-sharing in Ditrama was based?


  1. Of the three regions, Korva had the smallestnumber of residents.

  2. The populations of Mitro and Guadar eachincreased by a percentage that exceeded thepercentage by which the population ofKorva increased.

  3. Of the three regions, Korva's numericalincrease in population was the smallest

  4. Korva's population grew by a smaller percentage than did the population of at least one of the other two autonomous regions.


Solution

The correct option is D

Korva's population grew by a smaller percentage than did the population of at least one of the other two autonomous regions.


Korva's population has increased but its revenue share has decreased. This is possible only when the total increase in ditrama's population is more than that of korva's population

The correct answer option should bring out this

Option (a) is junk

Option (c ) and (d) are the classic wrong answers. It is enough if the population of either Mitro or Gaudar increases by a percentage higher than Korva's. It is not necessary that both the region's population must increase by a percentage higher than that of Korva's.(remember this is a must be true question)].

The correct answer option is (b)

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