If A = {3, 5, 7} and B = {2, 4, 9} and R is a relation given by “is less than”, write R as a set ordered pairs.
Given A = {3, 5, 7} and B = {2, 4, 9}
Now according to the condition:
R is a relation given by “is less than.”
⇒ R= A × B
⇒ R={(3,4),(3,9),(5,9),(7,9)}