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Market researchers recently reported that ninety percent of the people interviewed objected to a particular detergent's advertisement because of their...

GMAT Critical Reasoning : (CR) Questions

Source: Official Guide
Critical Reasoning
Assumption
MEDIUM
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Market researchers recently reported that ninety percent of the people interviewed objected to a particular detergent's advertisement because of their portrayal of women. Yet this detergent is purchased by twenty percent of consumers. So its advertisements must be considered to be unobjectionable to at least twenty percent of consumers.

The conclusion of the argument above depends on which of the following assumption?

A
People who object to a product's advertisements may still buy that product.
B
The people who buy this detergent are familiar with its advertisement.
C
Most of the people who do not buy this detergent consider this advertisements to be objectionable.
D
Most people wash their own clothes, so they have to buy some brand of detergent.
E
Most of the people in the market research study were women.
Solution

Passage Analysis:

Text from Passage Analysis
Market researchers recently reported that ninety percent of the people interviewed objected to a particular detergent's advertisement because of their portrayal of women.
  • What it says: Most people (90%) disliked the detergent ad due to how it showed women
  • What it does: Sets up the initial evidence about negative reactions to the advertisement
  • What it is: Research finding/study result
  • Visualization: Out of 100 people interviewed: 90 people objected, 10 people didn't object
Yet this detergent is purchased by twenty percent of consumers.
  • What it says: Despite the negative reactions, 20% of consumers still buy this detergent
  • What it does: Introduces contrasting evidence that seems to contradict the previous finding
  • What it is: Market data/sales information
  • Visualization: Out of 100 consumers: 20 people buy the detergent, 80 people don't buy it
So its advertisements must be considered to be unobjectionable to at least twenty percent of consumers.
  • What it says: The author concludes that at least 20% of consumers must find the ads acceptable
  • What it does: Draws a conclusion by connecting the sales data to consumer attitudes about the ads
  • What it is: Author's conclusion
  • Visualization: Author's logic: 20% buy detergent → therefore 20% must be okay with the ads

Argument Flow:

The argument starts with research showing 90% of people objected to the detergent's ads, then contrasts this with sales data showing 20% of consumers buy the product anyway. From this contrast, the author concludes that at least 20% must find the ads acceptable.

Main Conclusion:

The detergent's advertisements must be considered unobjectionable to at least twenty percent of consumers.

Logical Structure:

The author assumes that if people buy the detergent, they must find its advertisements acceptable. This creates a direct link between purchasing behavior and advertising approval, which bridges the gap between the sales data (20% buy it) and the conclusion (20% must approve of the ads).

Prethinking:

Question type:

Assumption - We need to find what the author must believe to be true for their conclusion to hold. The author jumps from '20% buy the detergent' to '20% find the ads unobjectionable.'

Precision of Claims

The claims involve specific percentages (90% objected, 20% purchase) and a direct connection between purchasing behavior and ad acceptance. The author assumes purchasing decisions directly reflect attitudes toward advertisements.

Strategy

For assumption questions, we identify ways the conclusion could fall apart while keeping the stated facts intact. The author concludes that since 20% buy the detergent, at least 20% must find the ads unobjectionable. We need to find what must be true for this logic to work - essentially, what connects buying behavior to ad approval.

Answer Choices Explained
A
People who object to a product's advertisements may still buy that product.
This statement actually works against the author's logic rather than supporting it. The author assumes that people who buy the detergent must find the ads unobjectionable. If people can buy products despite objecting to their ads, this would weaken the connection between purchasing and ad approval that the author relies on. This is not an assumption the argument depends on.
B
The people who buy this detergent are familiar with its advertisement.
This is exactly what the argument must assume to be true. The author concludes that since 20% buy the detergent, at least 20% must find the ads acceptable. But this logic only works if the buyers actually know about the advertisements. If buyers haven't seen the ads, we can't draw any conclusions about their opinions of those ads based on their purchasing behavior. This assumption is essential for connecting sales data to advertising approval.
C
Most of the people who do not buy this detergent consider this advertisements to be objectionable.
This focuses on non-buyers, but the argument's conclusion is specifically about the 20% who do buy the detergent and their presumed approval of the ads. What non-buyers think about the ads doesn't impact the logic connecting purchasing behavior to ad approval for actual buyers.
D
Most people wash their own clothes, so they have to buy some brand of detergent.
This is completely irrelevant to the argument's logic. The need to buy detergent in general doesn't help connect purchasing this specific detergent to approving of its advertisements. The argument isn't about why people need detergent, but about what purchasing behavior tells us about advertising approval.
E
Most of the people in the market research study were women.
The gender composition of the research study participants doesn't affect the logical connection between the 20% purchase rate and the conclusion about ad approval. The argument's flaw exists regardless of who was interviewed in the study.
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