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A candy factory manufactures various types of candy: 30% are dark chocolate, 25% are milk chocolate, 20% taffy, 5% caramel, and the rest are cream. Due to a hardware failure, all of the candy are mixed and dispatched into boxes holding 20 individually wrapped pieces of candy each. If 80 boxes are packed before the failure is caught, what is the maximum number of candy pieces a quality control inspector can open before coming across a taffy candy?
I agree there is a problem with the wording. I also got confused with the "before coming across a taffy candy" phrase. To solve it, the answer should be 1280 or the wording should be changed to "until coming across a taffy candy".
It's not that the other answer choices are not close. After seeing so many tricky questions, you don't want your answer to be wrong because you are on the other side of the limit. My opinion is that the question shouldn't give place to confusion.