Mathematics · Venn Diagram
In a group of house elements, let the number of balconies be represented by circle B, doors by circle D, and windows by circle W. If the number of units intersecting only B and D is 15, only B and W is 11, and the intersection of all three (B, D, and W) is 5, how many balconies are there that are either doors or windows?
- 116
- 217
- 320
- 431✓
Correct answer
31
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