Question

In a group of 60 persons each takes atleast one of coffee or tea.If 20 of them takes tea but not coffee and 35 takes tea find the number of persons to take coffee but not tea

Answer 1

Step-by-step explanation:

25 persons takes coffee but not tea.

Answer 2

Step-by-step explanation:

total number of persons = 60

person take tea = 35

person take tea but not coffee = 20

person take tea and coffee = 35 - 20 = 15

n(AuB) = n(A) + n(B) - n(AnB)

60 = 35 + n(B) - 15

60 = 20 + n(B)

n(B) = 60 - 20

n(B) = 40

person take only coffee = 40 - 15 = 25

hope you get your answer