Explanation:
Resistors can be connected in two ways;
1. Series connection
2. Parallel connection
When resistors are connected in series, the effective resistance is simply by adding up Rtotal = R1 + R2 + R3...
But when the are connected in parallel the effective resistance is simply 1/Rt = 1/R1 + 1/R2 + 1/R3
You can choose any value for your R1, R2 and R3 try it and see for yourself.
Good luck
