(i) R 1 ={(3,7), (4,7), (7,10), (8,1)}

(i) R ={( , ), ( , ), ( , ), ( , )} (ii) R = {( , ), ( , )} (iii) R = {( , ), ( , ), ( , ), ( , ), ( , ), ( , ), ( , )} Solution A ´ = {( , ), ( , ), ( , ), ( , ), ( , ), ( , ), ( , ), ( , ), ( , ), ( , ), ( , ), ( , )} (i) We note that, R ⊆ B . Thus, R is a relation from A to B . (ii) Here, ( , Î R , but ( , ∉ B . So, R is not a relation from A to B . (iii) Here, ( , ) Î R , but ( , ) ∉ B . So, R is not a relation from A to B . D E F G H I J Arrow diagram Fig. . Families Number of boys Relations and Functions