In 1984, 83% of all new cars sold in the U.S. had air conditioning and 39% had power windows. Use Venn diagrams to
determine:
a) the maximum possible percentage of these cars that had both air conditioning and power windows;
b) the minimum possible percentage of these cars that had both air conditioning and power windows;
c) the maximum possible percentage of these cars that had neither air conditioning nor power windows.

Question

In 1984, 83% of all new cars sold in the U.S. had air conditioning and 39% had power windows. Use Venn diagrams to
determine:
a) the maximum possible percentage of these cars that had both air conditioning and power windows;
b) the minimum possible percentage of these cars that had both air conditioning and power windows;
c) the maximum possible percentage of these cars that had neither air conditioning nor power windows.

jhonyy9 · Answer

so you need to start from 100% 
1. you know that 83% had air conditioning - so from this result that 100-83 had not air conditioning