Final Cover - For Printing

22. Intersection of Sets
    If A and B are any two sets, then the intersection of these two sets denoted as
    A^ ∩^ B is the set of elements which are common to both the sets A and B.

Eg. : If A = {1, 2, 3, 4}

B = {2, 3, 5}

Then, A^ ∩^ B = { 2, 3}

To enable the child to understand the concept, provide two sets of objects such that

there are some objects common in both the sets, say for instance, a pen, pencil,

eraser in one hand and a pencil, scale, stylus on the other hand. On exploration, the

child will be able to realize that, one object namely, the pencil is common in both the

sets and hence the intersection of two sets is the pencil.

23. Overlapping Sets
    Two sets are said to be overlapping if there exists at least one element common in
    both the sets. Note that overlapping/non-overlapping is just a literary description
    and has no definite symbols.
    Eg.: If A = {3, 4, 5}
    B = {4, 6, 8}
    In the above two sets, the element 4 is common in both the sets and hence the sets
    A and B are overlapping sets.


24. Non-Overlapping Sets (Disjoint Sets)
    Two sets are said to be non overlapping if there exists no common elements among
    the two sets.
    Eg. : Let A = { 1,2,3}
    B = {4, 5, 6}