Consider the Venn diagram below illustrating three sets $$A$...

Question Analysis
This question challenges students to calculate the number of elements in the complement of a set using information about the universal set and the set itself. It requires an understanding of set complements and basic set theory principles.

Key Concept Explanation
The complement of set () includes all elements in the universal set that are not in . The number of elements in can be found by subtracting the number of elements in from the total number of elements in .

Step-by-step Solution
1. Identify the total number of elements in the universal set : 20 elements.
2. Identify the number of elements in set : 8 elements.
3. The number of elements in the complement of (

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Algebra-1

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