Your mother gifted you a chocolate bunny on your birthday. But this is a
magic bunny. On the first night, the bunny either disappears or splits into two identical magic bunnies, with equal probability. The next night, if you have two bunnies, they each (independently) either disappear or split in two. And so it continues, each night any remaining bunnies each independently either disappear or split into two bunnies.
What is the probability that you will eventually be left with no magic
bunnies?
(In reply to
Solution by Brian Smith)
Let p = the probability that you are eventually left with no magic bunnies. There is no possibility of a magic bunny not changing overnight, as that would not be magical. It can either disappear or split into two. (of course, if that was a possibility, it would not change our final answer, as long as the probability of disappearing = the probability of doubling when something magical eventually happens).
So, p = (1/2)*1 + (1/2)*p^2
Rearranging, (p-1)^2 = 0
p=1
Final answer.
I wonder what if, instead of doubling, it tripled? I will probably do the math later.