In a survey of 200 people, 161 reported owning a car, 58 owned a bicycle and 74 had a valid mass transit pass. A total of 12% of the survey respondents reported owning all three, while 2.5% reported owning none. How many of the people surveyed owned exactly one of the three?
I would only like some help leading towards the answer, as I want to understand how to do it.
