Questions
In a certain town, 25% families own a phone and families 15% own a car, 65% families own neither a phone nor a car. 2000 families own both a car and a phone. Consider the following statements in this regard:
1. 10% families own both a car and a phone.
2. 35% families own either a car or a phone.
3. 40,000 families live in the town.
Which of the above statements are correct?
detailed solution
Correct option is C
n(P)=25%,n(C)=15% , nPc∩Cc=65%,n(P∩C)=2000nPc∩Cc=65%⇒ n(P∪C)c=65%⇒ n(P∪C)=35% Now n(P∪C)=n(P)+n(C)−n(P∩C)⇒ 35=25+15−n(P∩C)⇒ n(P∩C)=40−35=5⇒ 5% of the total =2000⇒ Total number of families =2000×1005=40000Therefore, statements 2 and 3 are correct.Similar Questions
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