Directions (19-20): Study the following information carefully to answer these questions:

At an Electronic Data processing Unit, five out of the eight program sets P, Q, R, S, T, U, V and W are to be operated daily. On any day, except for the first day a month, only three of the program sets must the ones that were operated on the previous day.
The program operation must also satisfy the following conditions:
(i) If program P is to be operated on a day, then V cannot be operated on that day.
(ii) If Q is to be operated on a day, then T must be one of the programs to be operated after Q
(iii) If R is to be operated on a day, then V must be one of the programs to be operated after R.
(iv) The last program to be operated on any day must be either S or U.

19. Which of the following could be the set of programs to be operated on the first day of a month?
1) U,Q,S,T,W
2) V,S,R,T,S
3) T,U,R,V,S
4) Q,S,R,V,U

20. Which of the following is true of any day's valid program set operation?
1) Q cannot be operated at third place.
2) P cannot be operated at third place.
3) R cannot be operated at fourth place.
4) T cannot be operated at third place.

• 19. 3)T,U,R,V,S
  
  Because,
  In option 1 & 4 - 2nd condition not satisfy;
  In option 2 - 3rd condition not satisfy.
  
  
  20. 3)R cannot be operated at fourth place.
  
  Because,
  According to the conditions, If R is operated means, V must operated after that.
  So, In 4th place R operated means, V must operated in 5th place. But its not possible. Because, In 5th place, either S or U must only be operate.
  
• 12 years agoHelpfull: Yes(10) No(0)
• 19.T,U,R,V,S
  1st is invalid since last must be S or U.
  2nd is invalid since V must be after R
  4th is invalid since if Q is operated T must also be operated
  
  20.R cannot be operated at 4th place since R must be followed by V. so V becomes 5th ,ie last. But either S or U shoulb be last. so 3 is true
• 11 years agoHelpfull: Yes(2) No(0)