In a family, there are four members: a mother, a father, a son, and a daughter. If the mother is a doctor and the father is an engineer, what is the profession of the son if he is studying to become a doctor?
In a class of students, some are studying Mathematics, some are studying Science, and some are studying both. If 10 students study Mathematics, 8 students study Science, and 4 students study both, how many students study only Mathematics?