All of the students in a certain class are either 7 or 8 years old. 80 percent
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All of the students in a certain class are either 7 or 8 years old. 80 percent of the students are boys and 25 percent of the girls are 8 years old. If there are an equal number of 7-year olds and 8-year-olds, what percent of the students in the class are boys who are 7 years old?
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Related Book For 
1014 Practice Questions For The New GRE
ISBN: 9780375429682
2nd Edition
Authors: The Princeton Review
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