Difficult
Two radioactive samples $A_1$ and $A_2$ have decay constants $10\lambda_0$ and $\lambda_0$ respectively. If they initially contain the same number of nuclei,find the ratio of the number of undecayed nuclei after time $t = 1/(9\lambda_0)$.
- A$1/e$
- B$1/e^2$
- C$1/e^9$
- D$1/e^{10}$
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