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

游客2024-01-12 35

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

[originaltext]M:Wouldyourathereatathomeorgoouttonight?W:I’drather

"Helicopterparenting"describesastyleofraisingchildrenwhereparentsa

Humanity’sprimal(原始的)effortstosystematizetheconceptsofsize,shapes,

[originaltext]M:HiJane,pleasecomeinandtakeaseat.W:Well,youwouldli

成人不易患急性腺样体炎的原因是A.腺样体无病理性增生 B.鼻咽部炎性病变较少见

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平面微动关节，从运动轴性上看，属于（ ）关节。A.单轴 B.双轴 C.多轴

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