According to a survey taken by an agency in a rural area, it has been observed that 75% of population treats diseases through self-medication without consulting a physician. Among the 12 residents surveyed on a particular day, find the probability that,
(a) At least two of them treat diseases through self-medication without consulting a physician.
(b) Exactly 10 of them consults physician before taking medication.
(c) None of them consults physician before taking medication.
(d) Less than 10 residents consult physician before taking medication.
(e) All of them treat diseases through self-medication without consulting a physician.
