SAT Math - Meaning of ordered pair?

Test Preparation SAT Preparation
1

<p>Hi, </p>

<p>I came across this SAT question: </p>

<p>For how many ordered pairs of positive integers (x,y) is 2x + 3y < 6?</p>

<p>While I got the question correct, I was wondering what exactly does ordered pair mean? (in case it comes out again). Does it just mean any two integers? So are (1,2) and (2,1) counted as one ordered pair or two ordered pairs?</p>

2

<p>In an ordered pair the order matters. So (1,2) and (2,1) are different.</p>

<p>Contrast this with a set (or unordered pair): {1,2} and {2,1} are the same set.</p>

3

<p>Oh I see, thanks a lot! (:</p>