Page 25 - Math Booklet Prep1first part1_Neat

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2) Set–builder method:

Example. X = { x : x is ……………………………….}

Express each of the following sets using the common property
method.

1) A : months of the year.
2) B : colours of Egypt's
flag
Solution

1) A : {a : a is one of the months of the year}
2) B : {b : b is one of the colours of Egypt's flag}

3) Venn diagram:

Sets can be represented by a Venn diagram ; elements of the set
are written inside a closed curve (polygon) as shown:

2? 2? 1 ?4 ?3
3? ? ?7

?5

A = {2 , 3 , 5} B = {1 , 4 , 5} C = {3 , 7}

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