A survey was conducted among 200 magazine subscribers of three different magazines A, B and C. It was found that 75 members do not subscribe magazine A, 100 members do not subscribe magazine B, 50 members do not subscribe magazine C and 125 subscribe atleast two of the three magazines. Find
(i) Number of members who subscribe exactly two magazines.
(ii) Number of members who subscribe only one magazine
Answers
Step-by-step explanation:
Autobiography of a Mobile Phone – Short Essay
Category: Essays and Paragraphs
On January 12, 2019 By Ananda
I’m a mobile phone. I wrote my autobiography. I am one of the very delicate phones. Tring! Tring! Is my sound. You can hear me everywhere. Life is incomplete without me. Let’s takes you back to my life story. I hope you will enjoy it.
My Origin:
I’m a latest touch phone and was made by a famous company. I shone like a bright sun in the start.
Answer:
Total number of persons=100
Number of persons who read magazine A=n(A)=28
Number of persons who read magazine B=n(B)=30
Number of persons who read magazine C=n(C)=42
Number of people who read both magazine A and B = n(A∩B)=8
Number of people who read both magazine B and C= n(B∩C)=5
Number of people who read both magazine A and C = n(A∩B)=10
Number of people who read both magazine A, B and C = n(A∩B∩C)=3
Number of people who read none of the three magazines= n(A∪B∪C)=n(A)+n(B)+n(C)−n(A∩B)−n(B∩C)−n(C∩A)+n(A∩B∩C)
n(A∪B∪C)=28+30+42−8−5−10+3
Therefore total number of readers=80
Number of readers who read none of the three magazines= 100−80=20