+31 Dogs in the GoodDog Obedience School win a blue ribbon for learning how to sit, a green ribbon for learning how to roll over, and a white ribbon for learning how to stay. There are 100 dogs in the school.
62 have blue ribbons, 55 have green ribbons, and 63 have white ribbons.
32 have a blue ribbon and a green ribbon; 31 have a green ribbon and a white ribbon; 38 have a blue ribbon and a white ribbon.
16 have all three ribbons.
How many dogs have not learned any tricks?
+9479 
There are 5 dogs that haven't learned any tricks.
(If you would like an explanation on how to make this Venn diagram please ask 
)
+129852 Where did you get the Venn diagram maker, hectictar???
There used to be a good one online that I used, but it "disappeared"....I haven't found any that I like
+9479 I used "paintbrush" which is basically an equivalent to MS Paint for Mac
(I'm not sure if MS Paint has a feature to adjust the opacity of a color...it has been a while since I have used that!)
+9479 If you feel comfortable using Desmos, I just made this template to create Venn Diagrams with:
https://www.desmos.com/calculator/rwbiqggckf
You can change each of the "labels" by modifying them in the list to whatever number you want, or click the check box to turn them on or off, and also you can click and drag them to on the graph move them around. Also you can customize the color of the circles or turn one of them on or off if you just want to make a Venn Diagram with 2 circles
*edit*
Just modified it because I realized I forgot to put a box around it!
*edit again*
Also I forgot to label the circles 
+9479 Also, one way to get a nice picture of the graph is to click the share button and then click "Export Image" 
