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Answer:
20%
Step-by-step explanation:
Given that,
In a survey of 3,100 people who owned a certain type of car, 620 said they would buy that type of car again.
It means there are 620 people surveyed who were satisfied with the car.
Required percentage is given by :
[tex]\%=\dfrac{620}{3100}\times 100\\\\\%=20\%[/tex]
So, the required percentage is 20%.