SOLUTION: a student missed 4 problems on a chemistry test and received a 67%. If all the problems were of equal value, how many problems were on the test?

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Question 770372: a student missed 4 problems on a chemistry test and received a 67%. If all the problems were of equal value, how many problems were on the test?
Answer by oscargut(2103) About Me  (Show Source):
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Answer: 12
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