Permalink Submitted by Alan Cooper on September 27, 2017

It is not true that the probabilities of the other amount being 2x and x/2 are both equal to 1/2.
In fact they depend on the size of x relative to whatever probability distribution arises from the process by which the envelopes were filled.

## The Two Envelopes Problem

It is not true that the probabilities of the other amount being 2x and x/2 are both equal to 1/2.

In fact they depend on the size of x relative to whatever probability distribution arises from the process by which the envelopes were filled.