At a monthly meeting, \frac2 5 of the attendees were males and \frac7 8 of the male attendees arrived on time. If \frac9 {10} of the female attendees arrived on time, what fraction of the attendees at the monthly meeting did not arrive on time?
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A\frac{11}{100}
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B\frac{3}{25}
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C\frac{7}{50}
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D\frac{3}{20}
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E\frac{4}{25}
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正确答案: A