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A and B are two sets. The number of elements in A∪B is 49, the number in A is 22 ...

A and B are two sets. The number of elements in A∪B is 49, the number in A is 22 and number in B is 34. How many elements are in A ∩ E?
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  • A 105
  • B 27
  • C 15
  • D 12
  • E 7
Correct Answer: Option E
Explanation:
Let x represent the intersection
34 - x + 22 - x + x = 49
  - x = 49 - 56; x = 7

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