Class 11 Maths Sets Roster or Tabular Form

Roster or Tabular Form

In roster form, all the elements of a set are listed, the elements are being separated by commas and are enclosed within braces { }

E.g. the set of all number in a dice is described in roster form as {1,2,3,4,5,6}.

Points to be noted in roster form:

  • In roster form, the order in which the elements are listed is immaterial. g. The set of all vowels in the English alphabet can be written as    {a, e, i, o, u} or {a,u,i,o,e}  or  {u, e, i, o, a}  or   {o, e, i, a, u}
  • The dots at the end tell us that the list of odd numbers continue indefinitely. E.g.:  The set of odd natural numbers is represented by {1, 3, 5, . . .}.
  • In roster form, an element is not generally repeated, i.e., all the elements are taken as distinct.

       E.g. The set of letters forming the word ‘SCHOOL’ is { S, C, H, O, L} .

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