What is the total monthly salary of Vasu ? I. Vasu's basic salary is Rs 100 more than Rajan's salary who also serves in Vasu's company. II. Other allowances drawn by Rajan besides his basic salary are Rs 2000 per month which is Rs 50 less than Vasu's salary. III. Rajan's basic salary is Rs 1550 per month.

Correct Answer: I, II and III together
  D) I, II and III together

From III, we have : Rajan's basic salary = Rs 1550.

From I,   we have : Vasu's basic salary = Rs (1550 + 100) =  Rs 1650.

From II.  we have : Rajan's other allowances = RS 2000

             and Vasu's other allowances = Rs 2050.

Vasu's monthly salary is (1650 + 2050) = Rs 3700.

Thus, all the three statements are required.