Which of the following hypothetical situations uses a personal (subjective) probability? A manager believes that there is a 15% chance her branch will be shut down within the month. A researcher conducts a survey of 500 teens to gauge interest in a new product, and 300 teens say that they would be interested in buying it, so the estimated interest rate for the new product amongst teens is 60%. In a survey done by a car manufacturing company, 100 of the 500 subjects indicate they would prefer to have a red car over any other color, so it is estimated that 20% of drivers prefer to drive red cars. A limited-release product was purchased by 100 people, 30 of which were female, so the probability that a randomly selected buyer of the product is female is 30%