Class VII

. If A = {3, 6, 9, 12} and B = {6, 8, 9} then intersection of A and B is
  1. {3, 6}
  2. {3, 12}
  3. {6, 9}
  4. {9, 12}
Number which occurs most frequently in a set of numbers is
  1. mean
  2. median
  3. mode
  4. None of above
Individual Objects in a set are called
  1. element
  2. set
  3. list
  4. None of above
Set of vowels in English alphabet contains elements
  1. {a, b, c, d, e, f}
  2. {a, e, i, o, u}
  3. {p, q, r, s, t}
  4. {l, m, n, o, p}
A set with no elements is
  1. a subset
  2. a universal set
  3. a null set
  4. a superset
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