Directions (Q. No. 3 – 4) : Answer the following questions based on the information and diagram given below :
An automobile company has advertised for the appointment of trainee engineers in different disciplines. First the applications received are thoroughly scrutinized and good
ones are called to the main centre of the company for two written tests and a viva. The written tests are of 2 hrs duration each.
The first written test E₁ checks the general scientific background and the second written test E₂ checks the basics of the discipline. Earlier all the candidates were required to
appear in both E₁ and E₂ but only those who clear both were allowed to appear in the viva for final selection.
To minimize the cost, the company has decided to change the procedure. Now they want to conduct this exam in three stages.
In the first stage they may offer the candidate to sit in either written test (E₁ or E₂ ) and if s/he passes in that he/she will go for next stage in which company may take his/her other
written test or viva. If he passes in this second stage, he will go for the remaining exam in third stage.
A candidate has to pass both the exams and viva for final selection. A candidate is rejected
if s/he fails at any stage. The expenses are < 500 per candidate for conducting each of E₁ , E₂ or Viva (V). The following historical data for 100 candidates is available from  previous selections.