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 only tea?(a) 10(b) 20(c) 30(d) 40I had been asked this question in an interview.My doubt stems from Venn Diagrams topic in section Sets of Mathematics – Class 11

In a population of 100 persons, 40 persons like tea and 30 persons lik

1.	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 only tea?(a) 10(b) 20(c) 30(d) 40I had been asked this question in an interview.My doubt stems from Venn Diagrams topic in section Sets of Mathematics – Class 11
Answer» Correct option is (c) 30 The explanation: Given, a + b + c + d = 100, a + c = 40, b + c = 30, c = 10 a+10=40 => a=30 i.e. 30 persons LIKE only TEA.

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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 only tea?(a) 10(b) 20(c) 30(d) 40I had been asked this question in an interview.My doubt stems from Venn Diagrams topic in section Sets of Mathematics – Class 11

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