1.

In a city 20% of the population travels by car, 50% travels by bus and 10% travels by both car and bus. Then, persons travelling by car or bus is A. 80% B. 40% C. 60% D. 70%

Answer»

Let A be the set of population travels by car(in percentage) and 

B be the set of population travels by bus(in percentage). 

Then A⋂B is the set of population travels by car and bus and 

A⋃B is the set of population travels by car or bus. 

Then,n(A) = 20 , (B) = 50 ,n(A⋂B) =10 

n(A⋃B) = n(A) + n(B) - n(A⋂B) 

= 20 + 50 - 10 

= 60 

∴ The set of population travels by car or bus is 60%



Discussion

No Comment Found

Related InterviewSolutions