Belief in at least 1 thing

After reviewing more of the videos on Venn Diagram I see that you have to subtract from the people who already believed in one or the other or both in order to get the correct amount for the people in the circle who believed in just one thing.
I add up now all the numbers to see how many people believed in at least 1 thing even thought some believed in 2 or 3 things they still believed in at least 1 thing
It totals to 89 people