Question Number 07 On a hospital staff, there are 4 dermatologists, 7 surgeons, 5 general practitioners,3 psychiatrists, and 3 orthopedic specialists. If a doctor is selected at random, find the...

Extracted text: Question Number 07 On a hospital staff, there are 4 dermatologists, 7 surgeons, 5 general practitioners,3 psychiatrists, and 3 orthopedic specialists. If a doctor is selected at random, find the probability that the doctor is, (a) A psychiatrist, surgeon, or dermatologist (b) A general practitioner or surgeon (c) An orthopedic specialist, a surgeon, or a dermatologist. (d) Not any dermatologist or psychiatrists.