QUESTION TEXT: Most people invest in the stock market …
QUESTION TYPE: Must be True
- Most people buy stocks without doing any research.
- Some people rely only on their broker.
- Some people just make hunches.
- Some people sometimes do research but just as often rely on brokers or hunches.
- Just a few people always do research before investing.
- Most investors make a profit.
ANALYSIS: Two most statements within the same group always overlap. So if most people who invest wear hats and most people who invest make money then I can say that at least some people who wear hats make money.
That’s actually the only way to combine statements that aren’t sufficient-necessary statements. If you’re given a long list of statements like the one above, look for two “most” statements.
- CORRECT. If most people don’t do research and most make a profit then there has to be some overlap between those two groups.
Note that the group of “some” people who make a profit without research could be a very small group.
- We only know that some people do this.
- We don’t know. Maybe they’re all losers with awful hunches and terrible brokers.
- We only know that some of them will profit. Most might lose.
- We don’t even know if some of those people make a profit.
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