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anonymous
 one year ago
There are 9 squares on a tic tac toe board, In how many different ways can the first 2 moves be made?
anonymous
 one year ago
There are 9 squares on a tic tac toe board, In how many different ways can the first 2 moves be made?

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Would I just start off with \[9 P 2?\]

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1The first move can be made in how many ways?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.02 ways? so \[9C2\] ?

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1You are correct. The answer is 9P2 which equals 72. You can make 9 different moves for the first move. Then for the second move, there are 8 empty squares, so you can make 8 different second moves. 9 * 8 = 72

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1Here order matters, so 9P2 is correct.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ahah ohh I thought I was making a mistake in my steps LOL. Thank you! :D

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1Sorry for confusing you. You were correct all along.
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