A) 1/3
B) 1/4
C) 1/8
D) 1/16
Correct Answer: C
Solution :
Remaining amount \[N={{N}_{0}}{{\left( \frac{1}{2} \right)}^{n}}\] \[{{N}_{0}}\] = initial amount \[N={{N}_{0}}{{\left( \frac{1}{2} \right)}^{90/30}}=\frac{{{N}_{0}}}{8}\]
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