Final answer:
In CPR for both infants and children with a single provider, the ratio of compressions to breaths is 30:2.
Step-by-step explanation:
The ratio of compressions to breaths for a single provider performing CPR on infants is 30:2. This means that you should perform 30 chest compressions followed by 2 rescue breaths.
For children, the ratio remains the same, 30 compressions to 2 breaths, when one rescuer is present. It's important to remember that these guidelines are designed to maximize the chance of survival in emergencies where proper respiration and circulation are compromised.