The following numbers of individuals in a company received special

The following numbers of individuals in a company received special assistance from the personnel department last year:
Drug/alcohol…………………….10
Family crisis counseling………… 20
Other……………………………. 20
Total…………………………….. 50
If you were to select someone at random from the records for last year, what is the probability that the person would be in each of the following categories:
(a) Drug/alcohol.
(b) Family.
(c) Drug/alcohol or family.
(d) Any category except "Other,
(e) Any of the three categories?
(f) Explain your answers to someone who has never had a course in statistics.