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

游客2024-01-12 62

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

Peterisgoingtoalake_________hecanfishwithhisfriends.A、whichB、hereC、w

他习惯和朋友通过微信来交流。HeisusedtocommunicatingwithfriendsontheWeChat.

Sixdifferentnumbersaretobeselectedfromthe(0,1,2,3,4,5,6)tocompos

Whatisthetotalnumberofdifferent5-digitintegersthatcontainallofthed

MachinesXandYrunatdifferentconstantrates，andmachineXcancompleteace

Themedianof21differentintegersis17.Whichofthefollowingistheleastp

Ifx,yandzaredifferentpositiveintegerslessthan10,whatisthegreatest

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John:Ihavetriedseveraldifferenttypesofpsychotherapyatvarioustimesin

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Theownershipofpetsbringsavarietyofbenefitsthattheuninitiatedwoul

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