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

游客2025-02-24 12

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

以上都表明只要有了点基础的英语语法知识和初步的英语词汇，在阅读时就应永远留心注意一切异常的和特殊的语言现象，并在看到它们时用心思考，直至彻底弄懂。

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