Electrician or Engineer question about circuits?

[erinlovesdan]

If I am to calculate total parallel resistance for the following parallel resistive circuits, would I simple add them to get Total Resistance?

R1-1200 ohms
R2-1100 ohms
R3-900 ohms

Total Resistance is 3200 ohms ? Is that correct?

And would it be the same if I were to calculate total resistance for just 2 resistors? R1+R2=Total Resistance?

Thanks!!