Aclass of 40 students completed a survey on what pets they like. the choices were: cats,
dogs and birds. everyone liked at least on pet. 10 students liked cats and birds but not dogs.
2 students liked dogs and birds but not cats. 12 students liked cats and birds. 8 students
liked cats and dogs. altogether, 28 students liked cats, 19 students like dogs and 15 students
liked birds.
determine the probability of randomly choosing a student who does not like cats or birds, but
likes dogs.