  Two works related to the concept of probability in the framework of the
many-worlds interpretation are presented. The first deals with recent
controversy in classical probability theory. Elga and D. Lewis argues that
Sleeping Beauty should have different credences for the result of a fair coin
toss in a particular situation. It is argued that when the coin is replaced by
a quantum coin, the credence is unambiguous and since one should not expect a
difference between classical and quantum coins, this provides a particular
resolution of the controversy. Second work is an analysis of a recent criticism
by Byrne and Hall of Everett-type approach presented by Chalmers. It is shown
that the criticism has no universal validity and that the Byrne and Hall
rejection of any Everett-type interpretation of quantum mechanics is unfounded.
