first --
OFFICIALLY CORRECT ANSWERS ARE CORRECT!
do not question officially correct answers!
far too many students on this forum make the mistake of questioning the correct answers; please note that doing so is a complete waste of your time and effort. i.e., exactly 0% of the time that you spend posting "isn't this official answer wrong?" is productive, and exactly 100% of that time is wasted.
"is this correct?" is NEVER a productive question to ask about one of GMAC's correct answers -- the answer is always yes.
"is this wrong?" / "is this X type of error?" is NEVER a productive question to ask about one of GMAC's correct answers -- the answer is always no.
instead, the questions you should be asking about correct official answers, if you don't understand them, are:
"why is this correct?"
"how does this work?"
"what understanding am i lacking that i need to understand this choice?"
this is a small, but hugely significant, change to your way of thinking -- you will suddenly find it much easier to understand the format, style, and conventions of the official problems if you dispose of the idea that they might be wrong.
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second:
on this problem, if you know the conventions by which gmac creates data sufficiency problems, you can actually figure out that the second statement CAN'T mean "4 children's tickets and 0 adult tickets".
here's how:
on an official DS problem, the two numbered statements will NEVER contradict each other. if you think that the two numbered statements are mutually contradictory, your interpretation of at least one of them is definitely wrong.
in this problem, if you interpret the second statement as "4 children's and 0 adult tickets", then that contradicts the first statement, proving that your interpretation of the second statement must be wrong.
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in any case, once you get over the "isn't this wrong" feeling (no, it's not wrong), you'll learn a valuable lesson about the way GMAC (and the english language in general) frames quantity statements. as another example, if i tell someone "i have two sons", this statement does not mean that i don't have any daughters.
don't question the official answers! LEARN from them!
Ron has been teaching various standardized tests for 20 years.
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Yves Saint-Laurent
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