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Does the problem involve permutations or? combinations? do not solve. the matching section of an exam has 4 questions and 7 possible answers. in how many different ways can a student answer the 4 ? questions, if none of the answer choices can be? repeated?
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The sum of two numbers is 86, and their difference is 20. find the two numbers
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(2+h)^4 is equal to what...
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