Six girls labelled P, Q, R, S, T and U are placed in a row facing towards north. Three girls are placed between P and Q. Q is placed second to the right of R. S is placed immediate right of Q. T is placed to the second to the left of U. Which girl is placed to the Left of Q?

U

Three girls are placed between P and Q.

CASE 1:

P   _     _     _    Q

CASE 2:

Q   _     _     _    P

Q is placed second to the right of R. S is placed immediate right of Q.

CASE 1:

P   _     R     _    Q     S

CASE 2:

R     _    Q     S     _     _    P

It is not possible because  in this case the total girls becomes 7 which  is not true. So, the only case1 is the only possibility.

T is placed to the second to the left of U.

P    T     R     U    Q     S

So, only U is to the left of Q.