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

游客2025-02-23 14

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

Marthainvited4friendstogowithhertothemovies.Thereare120differentw

Howmanydifferentfive-digitpositiveintegerscanbeformedusingthedigits1

Halhas4girlfriendsand5boyfriends.InhowmanydifferentwayscanHalinv

Inadistributionof850differentmeasurements,xcentimetersisatthe73rdpe

Inhowmanydifferentwayscan5identicalbluebooks,3identicalyellowbooks,

Ifn=pqr,wherep,q,andrarethreedifferentprimenumbers,howmanydiffere

Inhowmanydifferentwayscan3boysand3girlsbeseatedinarowof6chairs

Ifxandyaredifferentprimenumbers,eachgreaterthan2,whichofthefollow

Ifx,yandzaredifferentpositiveintegerslessthan10,whatisthegreatest

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Themedicine______hispainbutdidnotcurehisillness.A、activatedB、alleviated

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消防电话分机、电话插孔的工作状态指示灯包含（）A.通信指示灯 B.电源指

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医务人员进行口腔诊疗操作时应当A.戴口罩、帽子 B.可能出现病人血液、体液喷溅

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