ways to seat 5 in row, select 3 of 10, etc (plz check ans.)

Looks good. Good work. Except, when your teacher said be careful of the second one, use permutations.

P(10,5)=30,240
 
thanks so much!!!!!!! can i do that, do my hw and post what i get if im second guessign myself? what im tryign to say is, does this forrum frown upon that? im doing all the work, but like i said online is difficult with no teacher physically showing me :)
 
Helpers here love to see students showing their work and giving their reasoning! Please feel free to post your worked solutions for correction or confirmation. :D
 
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