# Order and Ranking: Exercise-2

1. In a row of 30 persons, A is 19th from the right end. Then find the position of A from left end?

1. 10
2. 11
3. 12
4. 13

Solution: Position of A from left end = [(Total number of persons - Position of A from right end) + 1]

= [(30 - 19) + 1] = 12

1. In a row of 35 girls, P is 8th to the right of Q, who is 21st from the right end. Then find the position of P from left end?

1. 20th
2. 21st
3. 22nd
4. 23rd

Solution: Position of Q from left end = [(Total number of girls - Position of Q from right end) + 1]

= [(35 - 21) + 1] = 15

now the position of P from left end = (Position of Q from left end + 8)

= 15 + 8 = 23rd

1. In a row, P is 12th from the left end. Then find the position of P from right end?

1. 12th
2. 15th
3. 18th
4. Can't be determined

Answer: (d) Can't be determined

Solution: We need the total number of persons in the row to find the position of P from right end and in the question total number of persons are not given.

1. In a row, M is 16th from the left end and 20th from the right end. Then find the total number of persons in the row?

1. 25
2. 30
3. 35
4. 40

Solution: Total number of persons = [(Position of M from left end + Position of M from right end) - 1]

= [(16 + 20) - 1] = 35

1. In a row, R is 8th to the left of P, who is 14th from the right end, and R is 12th from the left end. Then find the total number of persons in the row?

1. 22
2. 28
3. 33
4. 35

Solution: Position of R from left end = (Position of P from right end + 8)

= 14 + 8 = 22

now total number of persons in the row = [(Position of R from left end + Position of R from right end) - 1]

= [(12 + 22) - 1] = 33

1. In a row of 40 women, A is 13th from right end and B is 15th from the left end. Then find how mwny women are in between A abd B?

1. 10
2. 12
3. 14
4. 16

Solution: Here total number of women are greater than the sum of positions of A and B (40 > 28), so this is a simple case.

now number of women between A and B = [Total number of women - (Position of A from right end + Position of B from left end)]

= [40 - (13 + 15)] = 12

1. In a row of 30 students, P is 18th from left end and Q is 15th from right end. Then find how many students are in between P and Q?

1. 1 student
2. 2 students
3. 3 students
4. 4 students

Answer: (a) 1 student

Solution: Here total number of students are less than the sum of positions of P and Q (30 < 33), so this is the case of overlapping.

now number of students between P and Q = [(Position of P from left end + Position of Q from right end) - (Total number of students + 2)]

= [(18 + 15) - (30 + 2)]

= 33 - 32 = 1 student

1. In a row of 33 students, A is 10th from the right end and B is 10th from the left end. R is sitting exactly between A and B. Find the position of R?

1. 5th
2. 6th
3. 7th
4. 8th

Solution: Number of students between A and B = [Total number of students - (Position of A from right end + Position of B from left end)]

= [33 - (10 + 10)]

= 33 - 20 = 13

middle position between A and B = [(number of students between A and B + 1)/2]

= [(13 + 1)/2] = 7th

1. In a row, Ram is 18th from the left end and Shyam is 20th from the right end. When they interchamge their positions, then Shyam becomes 28th from right end. Then find the total number of persons in the row?

1. 30
2. 35
3. 40
4. 45

Solution: total number of persons = [(Position of Shyam from left end after interchange + Position of Shyam from right end after interchange) - 1]

= [(18 + 28) - 1] = 45

1. In a row of 48 boys, A is 22nd from the left end and B is 25th from the right end. When they interchange their positions, then B becomes 32nd from the right end. Then find the position of A from the left end after interchange?

1. 25th
2. 27th
3. 30th
4. 35th