来自郭杰华的问题
【问一道英文数学题目（美国高中水平的）Inasurveyof63people,23peoplesubscribedtomagazineA,21peoplesubscribedtomagazineB,and17subscribedtomagazineC.Foranytwoofthemagazaines,4peoplesubscribedtobothmagazinesb】
问一道英文数学题目（美国高中水平的）
Inasurveyof63people,23peoplesubscribedtomagazineA,21peoplesubscribedtomagazineB,and17subscribedtomagazineC.Foranytwoofthemagazaines,4peoplesubscribedtobothmagazinesbutnottothethridmagazine.If5peopleinthesurveydidnotsubscribetoanyofthreemagazines,howmanypeoplesubscribedtoallthreemagazines?
怎么我一直做都是负数呢?
1回答
2020-12-19 07:26