CALCULATOR
Choose Two from n=0…7 Calculator
Choose Two from n=0…7. N: 0, 1, 2, 3, 4, 5, 6, 7 only. Example: N: 5 number gives 10 number. Choose2 only, n0..7 finite integer choices; arbitrary n,k deferred. Original useful product scope; historical catalog title does not grant missing modes or source parity.
Choose2 only, n0..7 finite integer choices; arbitrary n,k deferred. Original useful product scope; historical catalog title does not grant missing modes or source parity. Derivation: Each distinct pair counted twice by ordered choices; n0/1 haszero pairs.
Accepted inputs: N: choose 0 (0), 1 (1), 2 (2), 3 (3), 4 (4), 5 (5), 6 (6), 7 (7).
How the calculation works
C(n,2)=n(n-1)/2
Worked example
With n 5, choose two from n=0…7 is 10 number.
Assumptions and limits
Choose2 only, n0..7 finite integer choices; arbitrary n,k deferred. Original useful product scope; historical catalog title does not grant missing modes or source parity. Derivation: Each distinct pair counted twice by ordered choices; n0/1 haszero pairs.