Eight people, S, T, U, V, W, X, Y and Z, are sitting in a straight line. All are facing towards the north. S sits third from the extreme left end of the line. W is an immediate neighbour of V. Only U sits between S and W. Z is sitting at the extreme right end of the line. T is an immediate neighbour of both Y and S. How many people sit to the right of W?

Step-by-step solution:

We number the seats from left to right as 1 to 8.

• S is 3rd from the left → Position 3
• Z is at the extreme right → Position 8

Using the clues:

1. T is an immediate neighbour of both Y and S
   → So arrangement must be either Y – T – S or S – T – Y
   Since S is at position 3, T must be at position 2, and Y at position 1.

   So:
   Pos1 = Y, Pos2 = T, Pos3 = S

2. Only U sits between S and W
   → W must be at position 5 (since position 4 will be U)

   So:
   Pos4 = U, Pos5 = W

3. W is an immediate neighbour of V
   → V must be next to W (pos4 or pos6)
   Pos4 is U, so V must be at position 6
4. Remaining seats:
   • Pos7 = X
   • Pos8 = Z (given)

Final arrangement:

1. Y
2. T
3. S
4. U
5. W
6. V
7. X
8. Z

How many people sit to the right of W (position 5)?

People to the right of W are at positions 6, 7, 8 → V, X, Z

👉 Total = 3 people