Shortcuts in Reasoning for Competitive Exams -Venn Diagram
Venn diagrams are pictorial way of represent the set of article. There are different regions which needs proper understanding for solving problems based on given Venn diagrams.
1 . ANALYSIS BASED VENN DIAGRAM-
In this type, generally a Venn diagram comprising of different geometrical figures is given. Each geometrical figure in the diagram represents a certain class.
1 – represents student passed in English only
2 – represents student passed in Reasoning only
3 – represents student passed in
both English Reasoning both.
Case – II Three articles
1 – represents P only
2 – represents Q only
3 – represents R only
4 – represents Q and R (not P)
5 – represents P and Q (not R)
6 – represents P and R (not Q)
7 – represents P, Q and R
1 ⇒ Engineer
2 ⇒ Doctor
3 ⇒ Farmer
4 ⇒ Doctor who is farmer also
5 ⇒ Engineer who is doctor also
6 ⇒ Engineer who is farmer also
7 ⇒ Person who is Engineer, doctor and farmer.
2 . Identification of Relation Based Venn Diagram –
In this type, some standard representations for groups of three items with different cases of venn diagrams are given.
I When one class of items is completely I included in the another class of item I then it is represented by the given I diagram
I – Mango
II – Fruit
Here, all mango are fruit.
I If two classes of item are completely I different from each other but they all I are completely included in third class I then the relationship is represent of the I diagram.
I – represent potato
II – represent onion
III – represent vegetable
If two group of items having some I common relationship and both of I them are all included in third class then the relationship is represented by the diagram.
Brother, Father, Male.
I – Brother
II – Father
III – Male
Some Brother may be Father and all are male.
When one class of item is completely included in another group while third is not related to both of them then such ‘condition are diagrammatically represented by
Cricketer, player and farmer
I – Cricketer
II – Player
III – Farmer
All cricketers are players but farmers not.
if three group of things are related to each other
Graduate, Engineer and Doctor Graduate may be Engineer and Doctor.
When two group of items are completely unrelated to each other while they are partly related with third group of item
Cloth, Red, Flowers.
Some cloth are Red and also some Flowers are red.
When group of items are completely different from each other .
Red, Yellow, Black
These are all different colour.