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

游客2024-01-12 80

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

Ounceforounce,blendsofdifferentartificialsweetenersmatchanyindividual

InspectionsystemXandinspectionsystemY,thoughbasedondifferentprinciple

Gall’shypothesisoftherebeingdifferentmentalfunctionslocalizedindiffere

Somebatcaves,likehoneybeehives,haveresidentsthattakeondifferentdutie

Ifn=pqr,wherep,q,andrarethreedifferentpositiveprimenumbers,howma

Thesumofndifferentpositiveintegersislessthan100.Whatisthegreatest

Apositiveintegerwithexactlytwodifferentdivisorsgreaterthan1mustbeA、a

Twodifferentpositiveintegersxandyareselectedfromtheoddintegersthat

Fromaboxof10lightbulbs,youaretoremove4.Howmanydifferentsetsof4l

Marthainvited4friendstogowithhertothemovies.Thereare120differentw

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ProfessorSmith______Chinayesterday.A、arrivedatB、gottoC、arrivedinD、reac

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近年来，国内大健康产业风起云涌，面向医药产业的并购整合也成为众多企业巨头梦的必由

女性，30岁，月经不规则2年，溢乳4个月，妇科按子宫发育不全治疗无效，神经科检查

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