Question 1173435
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Hi,
Ten students are lined up to be seated.
in how many ways can 5 students be seated in a row of 5 chairs?
Depends on how many people You have to choose from for each chair:
 10people for the 1st cair, 9 for the 2nd... etc 
     10people   x    9people     x      8people     x      7people  x     6people
 {{{1stChair}}}         {{{2ndChair}}}         {{{3rdChair}}}    {{{4thChair}}}       {{{5thChair}}}   
      10   x    9   x   8   x   7 x 6 = 30,240 ways
Wish You the Best in your Studies.