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June 2018 LSAT
Marketing agent: A survey of my business clients reveals that, of those who made a profit last year, 90 percent made ...
on September 17 at 01:30PM
Why is the answer C? Thanks!
on September 17 at 09:50PM
Premise: Of those who made a profit last year, 90% made at least $100,000.
Premise: In previous years, none of these business profited more than $10,000.
Conclusion: 90% of my business clients increased their profits at least tenfold last year.
The question stem asks us what is wrong with this argument.
A key phrase in this passage is "of those who made a profit last year." This narrows the client base down to a select few. Among this group, it is true that 90% increased their profits at least ten fold last year.
However, this is not what the marketing agent claimed. The agent claimed this statistic applied to all of the business clients. There could have been clients who did not profit at all last year, which makes the marketing agent's argument misleading. This is why C is the correct answer.
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