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

游客2024-01-12 40

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

Discoveriesinscienceandtechnologyarethoughtby"untaughtminds"tocom

Mostgrowingplantscontainmuchmorewaterthanallothermaterialscombined

(1)Faithschoolsandacademiesshouldbestrippedoftheirpowertochoosep

西白林属于()A.阴离子表面活性剂 B.阳离子表面活性剂 C.非离子表面活

四川最有名的手杖产品有（ ）。A.剑阁县的剑杖 B.垫江县的棕竹杖 C.峨

从个体心理结构的维度看，学前教育目的的结构包括（ ）A.德智体美 B.五大领域

商品经济是 A.以自给自足为特征的经济形式 B.为他人而生产的经济形式 C

从公共物品和服务及个人偏好角度出发来构建财政分权理论框架的，最具代表性的是（）

初产妇的第一产程时间为（ ）。A.2～4小时 B.4～6小时 C.6～8小

A.心电图运动试验 B.核素心肌灌注显象 C.动态心电图监测 D.血培养

四川最有名的手杖产品有（　　）。A.剑阁县的剑杖 B.垫江县的棕竹杖 C.峨

从个体心理结构的维度看，学前教育目的的结构包括（　）A.德智体美 B.五大领域

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