In a population of 100 persons, 40 persons like tea and 30 persons like coffee. 10 persons like both of them. How many persons like either tea or coffee
We don't want to count duplicates, so we have the following formula
Tea Or Coffee = Tea + Coffee - Both
Tea Or Coffee = 40 + 30 - 10
Tea Or Coffee = 60
We don't want to count duplicates, so we have the following formula
Tea Or Coffee = Tea + Coffee - Both
Tea Or Coffee = 40 + 30 - 10
Tea Or Coffee = 60