Question
If 20% of the students who failed in C++ failed in exactly 4 papers, then total how many students failed in C++?
Answer: Option C
:
C
Suppose total number of students who failed in C++ = x. 20% of the students failed in exactly 4 subjects, then % of students who failed in exactly 5 subject = 30%. Now 30% of x = 180. So x = 600. So 600 students failed in C++. option c
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:
C
Suppose total number of students who failed in C++ = x. 20% of the students failed in exactly 4 subjects, then % of students who failed in exactly 5 subject = 30%. Now 30% of x = 180. So x = 600. So 600 students failed in C++. option c
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