A) 23%
B) 40%
C) 53%
D) 33%
Correct Answer: A
Solution :
Failed in Maths = 42 Failed in English = 52 Failed in both = 17 Failed in English only \[(M-3)\] Failed in Maths only \[x=\frac{C}{M}\times \frac{M}{M-3}=\frac{c}{M-3}\] Failed in Maths or English or both \[=\frac{c}{M-3}-\frac{c}{M}=\frac{3c}{{{M}^{2}}-3M}\] Pass % in both \[\left. \begin{matrix} 380:280 \\ 20:22 \\ 11:10 \\ \end{matrix} \right\}::19:x\]
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