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

Correct option is C. 100beats per minute
Cardiac output=stroke volume × Heart rate ⇒ Cardiac output=5L or 5000mL ⇒ Blood volume in ventricles at the end of diastole=100ml ⇒ Blood volume in ventricles at the end of systole=50ml
Stroke volume=100−50=50ml. So, 5000ml=50ml × Heart rate
So, Heart rate=100beats per minute.
So, the correct answer is '100 beats per minute'