You can
put this solution on YOUR website!
Order of choosing the two doesn't matter, because picking
John first and Suzy second is the same as picking Suzy first
and John second. So this is the combinations of 6 things
taken 2 at a time.
C(6,2) = 15
That's 6 nCr 2 on the TI-83 or 84 calculators.
Press ON
Press CLEAR
Press 6
Press MATH
Press the left arrow key once
Press 3
Press ENTER
You will see:
6 nCr 2
15
Edwin