# help!

• Sep 26th 2007, 07:55 PM
chaunie
help!
i need help with this question!

In a track meet with 10 runners,how many ways can 1st,2nd and 3rd be awarded?
• Sep 26th 2007, 08:06 PM
Jhevon
Quote:

Originally Posted by chaunie
i need help with this question!

In a track meet with 10 runners,how many ways can 1st,2nd and 3rd be awarded?

it is $_{10}P_3 = 10 \cdot 9 \cdot 8 = 720$

can you tell me why that is?
• Sep 26th 2007, 08:17 PM
chaunie
yes!
there are 10 runners and 3 outcomes so you plug it in the calculator using nPr button. the order does matter in this situation. thanks!