Answer:
Step-by-step explanation:
From the given information:
Total number of students,
The choices were: Chess(C), Swimming(S), and Football(F).
Everyone liked at least one sport except 7 kids,
Chess is not an active sport; and
10 children liked Chess only,
The probability that a randomly-chosen child from this group does not like active kinds of sport is the Probability that a student plays chess only or like no kind of sport at all.