A sample contains two radioactive nuclie x and y with half-lives2 hour and 1 hour respectively. The nucleus x-decays to y and y-decays into a stable nucelus z.At t = 0, the activates of the components in the samewere equal. Find the ratio of the number of the active , nuclei of y at t = 4 hoursto the numberat t = 0.

A sample contains two radioactive nuclie x and y with half-lives2 hour

1.	A sample contains two radioactive nuclie x and y with half-lives2 hour and 1 hour respectively. The nucleus x-decays to y and y-decays into a stable nucelus z.At t = 0, the activates of the components in the samewere equal. Find the ratio of the number of the active , nuclei of y at t = 4 hoursto the numberat t = 0.
Answer» ANSWER :`0.25`