Question

a
13] In a city 20 percent of the population travels by car. 50 per cent by bus and 10 percent
travels by both car and bus. Then persons travelling by car or bus is:
a) 80 percent
b)
40 percent
c) 60 percent
d) 70 percent
​

Answer 1

70 percent

Step-by-step explanation:

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Answer 2

$\huge\bf { \red A \green N \pink S\blue W \orange E \purple R \green{=60}}$

Let x be the total number of population

Then according to the problem,

p(car)=20% of x=x/5

p(bus)=50% of x=x/2

p(car ∩ bus)=10% of x=x/10

Since,

p(car ∪ bus)=p(car)+p(bus)-p(car ∩ bus)

p(car ∪ bus)=x/5 + x/2 - x/10=3x/5 persons ans.

if x(population)=100

Then persons travelling by car or bus will be 60 percent