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Products need to serve as complement to each other. Butter and margarine are interchangeable and complement, rest of the categories are not.

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Demand levels for some categories of products are closely interdependent. When one type of a product can serve as a complement for another product, the levels of demand for these goods are positively related. An increase in the demand for one product usually increases the demand for its complementary product. Similarly, a decrease in the demand for one good causes a decrease in the demand for its complementary product.

Which of the following statements provides an example of the relationship between product demands described above?

RELATIONSHIP:- demands interdependent and increase in demand of one leads to increase in demand of other and similarly they decrease together

A. A decrease in the demand for CD players results in a decrease in the demand for CD`s.
CDs are played in CD player, so interdependent and correctly represents the relationship...CORRECT

B. An increase in the demand for butter results in an increase in the demand for margarine.
they are not interdependent. rather both are substitute for each other

C. A decrease in the demand for notebooks results in an increase in the demand for notebook bags.
the relationship is not positively related .. Increase and decrease

D. An increase in the demand for toothpaste results in an increase in the demand for cellular phones.
Two totally unrelated objects

E. A decrease in the demand for cable television results in an increase in the demand for satellite antennas.
the relationship is not positively related .. Increase and decrease

A
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Demand levels for some categories of products are closely interdependent. When one type of a product can serve as a complement for another product, the levels of demand for these goods are positively related. An increase in the demand for one product usually increases the demand for its complementary product. Similarly, a decrease in the demand for one good causes a decrease in the demand for its complementary product.

Which of the following statements provides an example of the relationship between product demands described above?


A. A decrease in the demand for CD players results in a decrease in the demand for CD`s. - Correct - CDs and CD players are positively related

B. An increase in the demand for butter results in an increase in the demand for margarine. - Incorrect - in general , a person consumes only one of these

C. A decrease in the demand for notebooks results in an increase in the demand for notebook bags. - Incorrect - not positive relation since one has decreased whereas the other has increased

D. An increase in the demand for toothpaste results in an increase in the demand for cellular phones. - Incorrect

E. A decrease in the demand for cable television results in an increase in the demand for satellite antennas. - Incorrect - same as C

Answer A
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nightblade354 Bunuel This is duplicate of https://gmatclub.com/forum/demand-level ... 70694.html. This could be archived or locked. Thanks!
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nightblade354 Bunuel This is duplicate of https://gmatclub.com/forum/demand-level ... 70694.html. This could be archived or locked. Thanks!
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Merged. Thank you.
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Meaning: Author says that demand for some categories of products is interdependent, and when the products are complimentary to each other their demands has a positive relation, which means that increase/decrease in demand of one leads to increase/decrease in demand of other.

Logic: This is an application type question. Keywords/Criteria are: demand is interdependent, products are complementary to each other, demands have a positive relation. Correct example or application must satisfy this criteria.

Answer: A
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As demand for two products is directly proportional, demand for one increases, then demand for another increases or demand for one decreases, then demand for another decreases.
Option C & E show inversely proportional relation, so both are out.
Two products of option D are irrelevant (not dependent to each other), so out.
In option B one product is substitute of another. So out.
Hence, option A maintains the required relationship.
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