Some businessmen and businesswoman were surveyed about their appointment calendars. Of the surveyed business people, 139 said they keep their business appointments on an electronic calendar, 56 keep their appointments on a paper calendar, and 23 keep both a paper calendar and an electronic calendar. Three respondents do not keep a calendar. Find the probability that a randomly selected surveyed business people

D. Does not keep a calendar.

a.0.0216

b.0.0171

c. 0.1304

d.0.0536

e.0.1768