Ranking Arrangement is an important topic from the point of view of many competitive exams. In Ordering and Ranking arrangement questions, position/rank of a person from left-right/top-bottom of a row/class is to be determined or rank/position is given & total no. of persons is to be calculated. You may also be asked to determine, using data given, which floor which person lives on.

1.How many number are there between n and m.

            Formula : m - n -1

Eg: How many numbers are there between 10 and 90.

         90 -10-1 = 79

2.Total Number of students = m ,

   Position from left of a particular student = n

   Then position from right of particular student = (m+1)-n

Eg: A B C D E F G H I J K L M N  O P Q R S T  U V W X Y Z.

         Position of y from Right=2

         Then position of y from left = (26+1) – 2 =25

Q1. Mohan ranks 8^th from the left and 25^th from the right in a class. How many students are there in the class?

A) 32                          B) 33                            C) 34                            D) 31

SOLUTION:

The given data is

Mohan’s Rank from Left end = 8

Mohan’s Rank from Right end = 25

We know that

T = L + R – 1

Where T = Total number of persons

L = Position from Left / Front / Upside / Top / First

R = Position from Right / Back / Down / Bottom / Last

Therefore, Number of students in the class (T) = 8 + 25 – 1 = 32

ANSWER: A

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