In a city, 20% of the population travels by car, 50% travels by bus and 10% travels by both car and bus. Then, the percentage of the population that travels by either car or bus is...
Choose the correct choice from the following choices:
A) 40%  B) 50%  C) 60%  D) 70%  E) 80%
According to the problem,   p(car)=20%=1/5   p(bus)=50%=1/2   p(car ∩ bus)=10%=1/10   Since p(car u bus)=p(car)+p(bus)-p(car n bus)   p(car ∪ bus)=1/5 + 1/2 - 1/10=3/5=60%   ANSWER:60%
<result>C</result>
In a city, 20% of the population travels by car, 50% travels by bus and 10% travels by both car and bus. Then, the percentage of the population that travels by either car or bus is...