Re: GMAT question - symantic problem?
That's what I got too, but the answer explanation says 990. There are 1000 ways to pick numbers, but 10 of them have all three with the same number (1 1 1, 2 2 2, etc).
I would buy this if the question read, "in which not all three digits are equal" rather than "in which all three digits are not equal."
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