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

游客2025-02-23 25

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

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Ifxandyaredifferentprimenumbers,eachgreaterthan2,whichofthefollow

Ifx,yandzaredifferentpositiveintegerslessthan10,whatisthegreatest

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