Let A = { 2,3,6,7} and B = { 4,5,6,8}. Let R be a
relation defined on A X B by ( a_{1},b_{1} )R ( a_{2},b_{2} ) if and only
if a_{1} + a_{2} = b_{1} + b_{2}. Then the number of elements in
R is .: Relation (Mathematics) Question | DivineJEE | divineJEE