Question 320025
i. 32 - 21 = 11
ii. 57 - 21 = 36
iii.  11 + 36  + 21 = 68
iv. 220 - 68 = 152
The venn diagram would use overlapping circles not pictured 
Aquarium     Both    Zoo
    36                21       11
Both would be in the overlapping area.