A) 100%
B) 75%
C) 50%
D) 25%
Correct Answer: B
Solution :
Number of half lives \[n=\frac{10}{5}=2,\]now \[\frac{N}{{{N}_{0}}}={{\left( \frac{1}{2} \right)}^{2}}=\frac{1}{4}\] Fraction decayed \[=1-\frac{N}{{{N}_{0}}}=1-\frac{1}{4}=\frac{3}{4}\] Þ In percentage \[=\frac{3}{4}\times 100=75%\]You need to login to perform this action.
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