Solutions for Ranking sequence

1.   Kanmani rank from top =s1, bottom=s2

Total boys who passed exam= (s1+s2-1) = (16 + 29 - 1) = 44
Total number of boys in the class = 44(passed) + 6(did not participate)
 +5(failed) = 55.

2. Murugan rank from left =s1=6,

Prassanna rank from right =s2=10

Boys who were in between them =8

So Murugan would rank s2=10+9=19^th from right

Total number of boys in the class = (s1+s2-1) = (6 + 19 - 1) = 24

3.Nithya rank from right =9,

Suganya rank from left =10

They exchange places, so Nityas new position is the same as Sugunya’s earlier position. This position is 17th from the right and 10th from the left. Therefore Number of girls in the row = (17 + 10 - 1) = 26.

4. Arun rank from left =5,

Suresh rank from right =6

Arun and Suresh interchange places, so Arun’s new position(13th from left) is the same as Suresh’s earlier position (6th from right).
So, number of children in the queue = (13 + 6 - 1) = 18.
Suresh’s new position is the same as Arun's earlier position fifth from left. Therefore Suresh’s position from the right = (18 – 5 + 1) = 14th.

5. Sathish is 17th from the last

Vimal is 7 ranks ahead of Sathish.

So, Vimal is 24th from the last.
Vimal’s rank from the start. = (39 – 24+1) = 16.

6. Number of students =35

Kamal 7^th from bottom Sunil 9^th from top

Kamal from top => (35=7-x+1) =>27

So the difference between sunil and Kamal is 27-9=18

Manoj is between them, so Kamal is 10th from Manoj.

7.    Ashok rank from left =15, Sakhti rank from right =7.They interchange places, so Sakhti’s new position (15th from right) which was Ashok’s earlier position (15th from left)
so, number of children in the queue = (15 +15 - 1) = 29.

8.    Ramya’s rank from left =5, Priya’s rank from right =6.They interchange places, so Ramya’s new position (13th from left) which was Ashok’s earlier position (6th from right)
so, number of children = (13 +6 - 1) = 18.

Now, Priya’s new position is Ramya’s earlier position which is 5th from the left.
Number of girls to the right of Priya = (18 - 5) = 13.
So, Priya’s new position is 14th from the right.

9.    A is 15^th from left, B is 4rth from right and  boys between A and B

Number of boys in the row = (15 + 4 + 3 ) = 22.
C is just left of A. So, C is 14th from the left end and 9th from the right end of the row.

10. Viji is 14^th from front

Jack is 17^th from end

Total 48members

Number of persons between Viji and Jack = 48 - (14 + 17) = 17.
Now, Mary lies in middle of these 17 persons i.e., at the 8^th position.
So, number of persons between Viji and Mary = 7.

11. Mahi 9^th from top, 38^th from bottom

     Total students = (s1+s2-1) => (38 +9 - 1) = 46 students.

12. Pallavi is 21st from right and Reena is 10th to the left of Pallavi. 

     So, Reena is 31st from right.
     Malini is 4th to the right of Reena. 
     So, Malini is 27th from the right.
     Also, Malini is 17th from the left.
     Therefore number of girls in the row = (27 + 17-1 ) = 43.

13. Sugan 16^th from top, 49^th from bottom

     Total students = (s1+s2-1) => (15 +49 - 1) = 64 students.

 14. Number of students = 49 

      Rajan is 18^th from top =s1

      49=18+x-1=> x=32.

      Rajan is 32nd from the last.

15. A is 15^th from left, B is 4rth from right and  boys between A and B

Number of boys in the row = (15 + 4 + 3) = 22.
C is just left of A. So, C is 14th from the left end and 9th from the right.