MATHS

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Across
  1. 3. Collection of items
  2. 5. a set with no elements
  3. 6. the elements are both in set A and set B
Down
  1. 1. all members if all of the sets under consideration is called
  2. 2. is an element of the universal set, not in set A
  3. 3. a set inside another set
  4. 4. The elements are either in set A or set set B