1.  The set  {woman OR unemployed}  is equal to the set  {women + unemployed man}.

    The last set is the union of two disjoint sets, which is easier to analyse.



2.  From the condition, there are 300 = 900 - 600 women in the town.

    The number of unemployed man is 600 - 300 = 300.



3.  So, the set  {women + unemployed man}  consists of 300 + 300 = 600 persons.


    Now the probability under the question = (women + unemploeyed man)/(total population) =  = .