In a population of 100 persons, 40 persons like tea and 30 persons like coffee. 10 persons like both

Discussion in 'Calculator Requests' started by math_celebrity, Jul 17, 2021.

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  1. math_celebrity

    math_celebrity Administrator Staff Member

    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
     
    math_celebrity, Jul 17, 2021
    #1

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