Final answer:
To find the number of patients who were either current or former smokers, we add the number of current smokers and former smokers together. The total number of patients who were either current or former smokers is 51.
Step-by-step explanation:
To find the number of patients who were either current or former smokers, we need to add the number of current smokers and former smokers together. From the question, we know that there were 14 current smokers (C) and 37 former smokers (F).
So the total number of patients who were either current or former smokers is: 14 (C) + 37 (F) = 51.