Call the middle intersection X,
and you will the the following picture.
Since the universal set over here is 150,
we add each one and get,
Thus,
Thus,
I need help with a Venn Diagram question. Oridnarily I know you would start in the middle but that is the piece that is missing in this problem. Can you please provide a formula to work this problem?
A recent survey of 150 people showed the following investments in stocks bonds and CODs
111 people invested in stocks
98 people invested in bonds
100 people invested in CODs
80 people invested in stocks and bonds
83 people invested in bonds and CODs
85 people invested in stocks and CODs
9 people did not invest in any of the three
How many people invested in all three