Ratio of atoms of and left after the process of decay at secular equilibrium if their…

CHEMISTRY · Subjective · AoPS · Mathematics · Ratios and Percents · Basic Ratio Problems

Problem

Ratio of atoms of

B

and

A

left after the process of decay at secular equilibrium if their average life are 12 year and 3 year for

A

and

B

respectively.

\tau \quad A \quad \xrightarrow{12 \text{ yr.}} \quad B \quad \xrightarrow{3 \text{ yr.}} \quad C