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

游客2025-02-24 33

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

Twodifferentpositiveintegersxandyareselectedfromtheoddintegersthat

Marthainvited4friendstogowithhertothemovies.Thereare120differentw

InhowmanydifferentwayscanthelettersinthewordSTUDYbeordered?5!=120

Fromaboxof10lightbulbs,youaretoremove4.Howmanydifferentsetsof4l

Marthainvited4friendstogowithhertothemovies.Thereare120differentw

Agroupof20valueshasameanof85andamedianof80.Adifferentgroupof3

Howmanydifferentfive-digitpositiveintegerscanbeformedusingthedigits1

Inadistributionof850differentmeasurements,xcentimetersisatthe73rdpe

Inhowmanydifferentwayscan5identicalbluebooks,3identicalyellowbooks,

Ifn=pqr,wherep,q,andrarethreedifferentprimenumbers,howmanydiffere

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（）不属于计算机控制器中的部件。 A.指令寄存器IR B.程序计数器PC

患者男，12岁。反复咳嗽2个月余，伴间断发热，多为低热。有两次咳嗽后吐出少许鲜血

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