RANKING:
Ranking broadly deals with the problems related to the arrangement of persons or objects in ascending or descending order based on different parameters like height, weight, merit, position, and so on.
In this article, we are going to cover the key concepts of the Order and Ranking reasoning section along with the solved examples, practice questions, tips and tricks, and more.
TYPES OF RANKING PROBLEMS:
Ranking Based
I this type of order and ranking reasoning, candidates need to find the position or rank of a person. Ranking based questions can be further divided into various categonries and some of them are given below.
(a) Rank from Left/Right: In this type of order and ranking reasoning, candidates need to find the position or rank of a person from left or right end, according to the given question.
(b) Total Person in a Row: In this type of order and ranking reasoning, candidates need to find the total number of people in a row or a class.
(c) Person between two people: This type of order and ranking reasoning is also known as overlapping based reasoning. In this type of order and ranking reasoning, candidates need to find the number of persons between two people when their rank satisfies the condition of overlapping.
(d) Persons between two people: This type of order and ranking reasoning is also known as non overlapping based reasoning. In this type of order and ranking reasoning, candidates need to find the number of persons between the two people when their rank does not satisfy the condition of overlapping.
(e) Interchanging the positions: In this type of order and ranking reasoning, candidates need to find the position of person or the total number of persons in the row when 2 people change their positions.
(f) Ratio Based Problems: In this type of order and ranking reasoning, candidates need to find the position or rank of a girl or a boy when the ratio of them is given.
👉STEPS TO FOLLOW:
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Read sentence by sentence and construct the logic accordingly.
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Order or Position will be either horizontal or vertical. Decide the direction of the arrangement.
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Consider all possible cases, but discard all except the correct one at the end to get the correct order or ranking.
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Non-consideration of all the possible cases will lead to the wrong order or ranking.
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Either use the ranking to get the total number of objects/people or use the total number to evaluate the ranking.
IMPORTANT RULES TO SOLVE RANKING:
Rule - 1:-
The total number of a person/objects in a group or class is equal to one less than the sum of the positions of the same person from both the ends (either right and left or top and bottom). Since the same person is counted twice in the sum, the final answer is one less than the total sum.
Total number of objects/persons
= [(sum of positions of the same person/object from both sides) – 1]
Rule-2:-
The total number of person/object in a group is the sum of before or after the given person in a row and the position of the same person from the other side.
Total no. of persons/objects = No. of persons/objects before or after the given person in a row + Position of the same person from the other side.
Rule-3:-
If the positions of two objects/persons are given from the opposite ends and also the total number of persons/objects, then the problem can be addressed in two different ways to determine the number of persons between these two persons/objects.
Case 1: Overlapping:
The total number of objects or persons in a group is always lesser than the addition of the position of two objects or persons from ends
Case 2: Non – overlapping:
The total number of objects or persons in a group is always greater than the addition of the position of two objects or persons from ends.
Rule -4:-
Non-predictable order/ranking: If the data in the question provides only then information of position different objects or persons then it is impossible to find the total number of objects or people in a group or class. As the cases can either be an overlapping or non-overlapping one. In such a situation, the final answer will always be found. Save the time by not trying to solve these type of questions.
Rule-5:-
Swapping of position to find the order/ ranking
In this section, the placement or the position of the two objects/persons are interchanged. The position of the two people or objects is examined before and after the interchanged.
The place value or the position of the second person from the same side as before interchanging
= Position of 2nd person from the same side before interchanging + (Position of 1st person after interchanging – position of 1st person before interchanging from the same side)
Rule-6:-
If positions of two objects from opposite sides of the row are known there is a third object right in the middle of the two, then the total number of objects can be evaluated based on the position of the third object.
Case 1: The position of the third object is known from both the sides
Case 2: The position of the third object is known from either of the sides.
Rule-7:-
To find the minimum number of members in the group.
The Minimum number of persons = Sum of positions of persons from both sides – Persons between them – 2.
