Order and Ranking

Test
Materials

For this topic, the questions are asked for a person related to its rank from left/ right/ top/ bottom side and the total required persons are asked. While the opposite can also be asked in some cases. Thus, many different types of questions can be formed based position or the rank of the persons in the row. There are many different types of cases which are asked from order and ranking.

  1. Rank of a person from the right side or left side: Here we are required to find the number of people who are in a row. The rank of two people and the total number of people sitting between two people is given to us. There are two cases possible in this scenario. One is an overlapping case where a number of people > right position of one person + left position of another person. So, the total people = Sum of positions of two different people from both the sides + the number of people between two people. Example: There are 52 people in one row. Ahmed is the 14th person from the left side of this row. Ali is a 10th person from the right side. How many people are sitting between these two? Solution: The total number of people between Ahmed and Ali will be 52 – (14 + 10) = 28.

  2. Overlapping case: The number of students < Right position of a person + Left position of another person). Example: There 46 people in a row. Ali is 26th person from the right side of the row. Ahmed is a 32nd person from the left side of the row. Find out the total number of people sitting between these two. Solution: The total number of people will be (26 + 32) – 46 – 2 = 58 – 44 = 14 people.

  3. Total number of people for the data which is given: We have to determine the number of people when the ranks of a person are given from both the sides of the row. Thus, Total persons are R1 + R2 – 1. R represents the ranks of a person from both sides. Example: Position of Ali in a row is 26th from the right side of the row. He is sitting 38th from the left side of the row. Find out the total number of people in the row. Solution: The total people will be (position of Ali from the left side + the position of Ali from the right side) – 1. Thus, the total number of people will be (38 + 26) – 1 = 63