Shortcuts in Reasoning for Competitive Exams -Venn Diagram

Shortcuts in Reasoning for Competitive Exams -Venn Diagram

Shortcuts in Reasoning Quantitative Aptitude English

Venn Diagram

INTRODUCTION

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.

Shortcut Approach

Case -1:
Two articles:

EXAMPLE

1 – represents student passed in English only
2 – represents student passed in Reasoning only
3 – represents student passed in
both English Reasoning both.

Shortcut Approach

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

EXAMPLE

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.

Shortcut Approach

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.

Shortcut Approach

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.

EXAMPLE
I – represent potato
II – represent onion
III – represent vegetable

Shortcut Approach

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.

EXAMPLE
Brother, Father, Male.

I – Brother
II – Father
III – Male
Some Brother may be Father and all are male.

Shortcut Approach

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

EXAMPLE
Cricketer, player and farmer
I – Cricketer
II – Player
III – Farmer
All cricketers are players but farmers not.

Shortcut Approach

if three group of things are related to each other

EXAMPLE
Graduate, Engineer and Doctor Graduate may be Engineer and Doctor.

Shortcut Approach

When two group of items are completely unrelated to each other while they are partly related with third group of item

EXAMPLE
Cloth, Red, Flowers.
Some cloth are Red and also some Flowers are red.

Shortcut Approach

When group of items are completely different from each other .

EXAMPLE
Red, Yellow, Black
These are all different colour.