RELATIONS AND FUNCTIONS - NCERT
20 EXEMPLAR PROBLEMS – MATHEMATICS (i) A relation may be represented either by the Roster form or by the set builder form, or by an arrow diagram which is a visual representation of a relation. (ii) If n (A) = p, n (B) = q; then the n (A × B) = pq and the total number of possible relations from the set A to set B = 2pq.
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