Six people U, V, W, X, Y, and Z stand in a line. Y is between V and Z. W is to the immediate left of V. X is not at either end. U is to the immediate right of Z. If W is at the far left, who is in the 4th position from the left?
Step-by-step Solution:
Let the 6 positions be numbered 1 to 6 from left to right. Given that W is at the far left: W is in position 1. W is to the immediate left of V: V is in position 2. Y is between V and Z. Since V is at 2, Y and Z must follow. Y is placed somewhere between V and Z, meaning the order must be V, ..., Y, ..., Z. U is to the immediate right of Z. This forms a block: ZU. Since X is not at either end, X cannot be in position 6. The group ZU must therefore occupy positions 5 and 6 (Z=5, U=6) to ensure they fit while leaving room for Y and X in positions 3 and 4. Since Y must be between V(2) and Z(5), Y can be in position 3 or 4. X will take the remaining spot (3 or 4). Therefore, the 4th position from the left is either X or Y.