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(1)男生人數+女生人數=全班人數,(2)男生人數=女生人數的6分之5,所以由(1)和(2)得:女生人數的6分之5+女生人數=全班人數,即女生人數的6分之11(解釋:6分之5再加1等於6分之11),所以女生人數占全班人數的11分之6 .
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