What would be the heart rate of a person if the cardiac output is 5 L, blood volume in the ventricles at the end of diastole is 100 mL and at the end of ventricular systole is 50 mL?

Stroke volume $=$End diastolic volume $-$ End systolic volume$=100-50=50 \mathrm{mL}$

Cardiac output $=$stroke volume $\times$heart rate

Heart rate $=$cardiac output $÷$ stroke volume

$=$ $5000 \mathrm{mL} ÷ 50 \mathrm{mL}$ $=$$100$ beats per minute