A) 4.125%
B) 3.125%
C) 31.1%
D) 42.125%
Correct Answer: B
Solution :
Remaining quantity \[N={{N}_{0}}{{\left( \frac{1}{2} \right)}^{n}}\] \[\begin{align} & ={{N}_{0}}{{\left( \frac{1}{2} \right)}^{5}}=\frac{{{N}_{0}}}{32} \\ & =\frac{{{N}_{0}}}{30\times {{N}_{0}}}\times 100=3.125\,% \\ \end{align}\]
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