Martha invited 4 friends to go with her to the movies. There are 120 different w

游客2024-01-12 48

问题 Martha invited 4 friends to go with her to the movies. There are 120 different ways in which they can sit together in a row of 5 seats, one person per seat. In how many of those ways is Martha sitting in the middle seat?

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答案 24

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Martha invited 4 friends to go with her to the movies. There are 120 different w

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InspectionsystemXandinspectionsystemY,thoughbasedondifferentprinciple

Gall’shypothesisoftherebeingdifferentmentalfunctionslocalizedindiffere

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Marthainvited4friendstogowithhertothemovies.Thereare120differentw

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下列采暖居住建筑外墙外保温技术中哪一种系统不适用于严寒地区？()A.膨胀(挤

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