Question 1168531
.
<pre>

Start the solution by noticing that  117 + 293 + 140 + 46 = 596.


It means that all listed subsets in the problem are disjoint.


Based on it, the rest of the solution is very simple:

 
   +--------------------------------------------------------------------+
   |     Add the married and widowers and relate the sum to the total.  |
   +--------------------------------------------------------------------+

</pre>

If you make these calculations correctly, you will get the answer.