Discussion
What is the percentage of candidates who are failing in second stage viva exam after clearing E2 exam in first stage ?
Answer: C
The percentage is 25%.
Use the diagram for the 60 candidates who cleared E2 in the first stage. Those who cleared the viva are 30 (cleared both) + 15 (cleared viva but failed E1) = 45.
\[ \begin{aligned} \text{failed viva} &= 60 - 45 = 15 \\ \text{percentage} &= \frac{15}{60} \times 100 = 25\% \end{aligned} \]
The 15 who failed are the 10 who cleared E1 but failed the viva and the 5 who failed both.
75% is the share who passed the viva. 66·7% is 40/60, the share who cleared E1, and 33·3% is 15/45, which compares the failures with those who passed instead of with all 60.
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