15.6.26 Definition and properties of probability
condition: There are 30 students in the group. Of these, 14 are studying French, 11 German, 16 Japanese, 6 French and German, 5 German and Japanese, 7 French and Japanese, and 4 all three languages. Determine the probability that a randomly selected student: a) does not study any language: b) studies only two languages.
Definition and properties of probability, probability spaces, the classical definition of probability and its application in problems of everyday life.