Final answer:
The ground electrode should be placed on the right upper arm.
Step-by-step explanation:
When placing electrodes on the patient for telemetry, the EKG tech should place the ground electrode on the right upper arm. In a 12-lead ECG, there are six electrodes placed on the chest and four electrodes placed on the limbs. The ground electrode is typically placed on the right upper arm, which serves as a reference point for the other leads.