Concept:Arrange the seven people in a straight line facing north using the given positional clues.
Explanation:Only two people sit to the left of P. So P is the third from the left.
Only three people sit between P and W. Since P is third from left, W is either 7th from left (right end) or 3+4=7th? Actually three between means difference of 4 positions: W could be 7th (rightmost) or P=3, three between means positions 4,5,6 between, so W at 7. Or W could be to left? But only two left of P, so P can't be at rightmost. So W is at position 7 (right end).
Only one person sits between W and X. W at 7, so X is at position 5 (one between: position 6).
R sits to immediate left of O. They are a pair with R left of O.
Y is not an immediate neighbour of W (position 7). So Y cannot be at position 6.
Now we have positions: 1,2,3(P),4,5(X),6,7(W). The remaining people: O, Q, R, Y. R and O must be adjacent with R left of O. Possible pairs: (1,2), (2,3 cannot because 3 is P), (3,4 cannot), (4,5 cannot because 5 is X), (5,6 cannot), (6,7 cannot because 7 is W). So only possible is positions (1,2) with R at 1, O at 2.
Then positions left: 4 and 6 for Q and Y. Y cannot be neighbour of W, so Y cannot be at 6 (neighbour of W at 7). Thus Y must be at 4, and Q at 6.
Final arrangement (left to right): 1:R, 2:O, 3:P, 4:Y, 5:X, 6:Q, 7:W.
Count people to the right of Q: positions 7 (W) only — one person.
Answer:One
