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10 Nov 2018, 22:45
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At Mnemosyne Middle School, there are 700 students: all the students are boys or girls in the 4th or 5th grade. There are 320 students in the 4th grade, and there are 210 girls in the 5th grade. Fifty percent of the 5th graders and 40% of the 4th graders take Mandarin Chinese. Ninety 5th grade boys do not take Mandarin Chinese. The number of 4th grade girls taking Mandarin Chinese is less than half of the number of 5th grade girls taking Mandarin Chinese. Which of the following could be the number of 4th grade boys in Mandarin Chinese?
(A) 10
(B) 40
(C) 70
(D) 100
(E) 130
(A) 10
(B) 40
(C) 70
(D) 100
(E) 130
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11 Nov 2018, 01:50
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Discussed here: at-mnemosyne-middle-school-there-are-700-students-all-the-students-a-235051.html
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