Ten persons- P, Q, R, S, T, U, V, W, X and Y are purchasing some products one after another but not necessarily in the same order.
Only R and S purchase products after V.
| Case 1 | Case 2 |
| Person | Person |
| |
| |
| |
| |
| |
| |
| |
| V | V |
| R | S |
| S | R |
Three persons purchase product between S and Q.
| Case 1 | Case 2 |
| Person | Person |
| |
| |
| |
| |
| Q |
| Q | |
| |
| V | V |
| R | S |
| S | R |
Only one person purchases product between Q and W.
As persons purchase product before W as after P.
| Case 1 | Case 2 |
| Person | Person |
| |
| |
| |
| W | P |
| Q |
| Q | |
| P | W |
| V | V |
| R | S |
| S | R |
Two persons purchase product between P and T.
Thus, Case 1 gets cancelled.
Two persons purchase products between U and X.
X does not purchase products before P.
Now, only Y is remaining.
This is the final arrangement.
As many persons purchase product between U and W as between Y and X.
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