Question 1130324
.
Thx for letting us know . . . 


What is your question ( . . . if you have it . . . ) ?




--------------
<U>Comment from student</U> : Find P(Dc)
--------------



<U>My response</U> :  OK.


<pre>
Notice that the entire "universal" set consists of  (20+15) + (25+10) + (10 + 20) = 100 elements;  subset D consists of 25  elements.


So,  the subset Dc, complement to D, consists of  (100-25) = 75  elements,


and, therefore,  P(Dc) = {{{75/100}}} = {{{3/4}}} = 0.75 = 75%.
</pre>

Solved, answered, explained and completed.