Seven friends S, T, U, V, W, X and Y, each has a different height. W is taller than X but shorter than V. Only three people are taller than V. T is taller than U but shorter than S. Y is the shortest among all. How many persons are taller than U?

2

1) W scored more than X but less than V. 

⇒ X < W < V  

2) T scored more than U but less than S.

⇒ U < T < S

3) Y scored the least among all.

⇒ Y < X

4) Only three people scored more than V.

⇒ V < three people

⇒ V < U < T < S

Thus, combining all the given statements, we will get,

⇒ Y < X < W < V < U < T < S

so, only 2 persons scored taller than U