# GMAT 考满分题库

Two buses and a van were employed to transport a class of students on a field trip. $\frac{3}{5}$ of the class boarded the first bus. $\frac{2}{3}$ of the remaining students boarded the second bus, and the rest of the students boarded the van. When the second bus broke down,$\frac{ 1}{2}$ of the students on the second bus boarded the first bus. What fraction of the class was on board the first bus?
• A$\frac{1}{2}$
• B$\frac{2}{3}$
• C$\frac{11}{15}$
• D$\frac{23}{30}$
• E$\frac{4}{5}$

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