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It is required to estimate the probability of randomly selecting a black car.

Subjective probability refers to estimating the probability value of an event using past knowledge. It is purely based on one鈥檚 opinion and is not obtained from any experimental/actual data.

The probability value estimated using subjective judgement can vary from person to person.

Now, the event considered is the selection of a black car.

Based on the available information, approximately 19% of the cars in North America are black.

It can be said that out of 100 cars, the colour of approximately between 10 to 30 cars is likely to be black.

Therefore, the estimated probability value that the randomly selected car will be black should be between 0.10 and 0.30.