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Math

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In how many different ways can the top eight new indie bands be ranked on a top eight list? The top hit song for each of the eight bands will compete to receive monetary awards of $1000, $500 and $250, respectively. In how many ways can the awards be given out?

I think the first question is 8 different ways because they will be ranked on a list of 8.
I think the second question is 8*8*8=512 ways the awards can be given out.....but im not sure if i did this right, please help!

  • Math -

    say we have 8 bands numbered 1 through 8
    chance that band 1 is top = 1/8
    then chance that band 2 is second = 1/7
    then chance that band 3 is third = 1/6
    etc
    so I claim
    8! ways (big number, you compute :)

    Now how many permutations of 8 taken 3 at a time (permutations not combinations because the order of prizes counts within each group of three) ?

    n!/(n-r)! = 8!/(8-3)! = 8!/5! = 8*7*6
    = 336

  • Math -

    oh okay i get it...

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