Question 852101
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Hi,
assume one subject is chosen at random from the smoking survey below.
                men       women        total
smoker         32         41           73
non-sm      18         9            27
total          50          50           100
P(woman 0r Non-smoker) = {{{1/2 + 27/100 - 9/100 = 68/100 = 17/25 }}}