Question

SOLVED EXAMPLES
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Example 1. In a group of 70 people, 37 like coffee, 52 like tea and each person likes at least
one of the two drinks. How many like both coffee and tea ?
Let A he the set of people who like coffee and B be the set of people who like tea. ​

Answer 1

Answer:

20

Step-by-step explanation:

n(A) = 37

n(B) = 52

n(A U B) = 70

n (A Intersection B)= number of people who like both tea and coffee

n(A intersection B) = n(A) + n(B) - n (A U B)

n(A intersection B) = 37+53-70

= 20

so 20 people like both tea and coffee