golf ball from one sack.
If Tiger opens the sack labelled
"Callaway," for instance, and the golf ball turns out to be
Titleist, then he would know that the other two sacks
could not contain Titleist golf balls.
The other sacks
would have either Callaway or Bridgestone golf balls in them.
Since all the
mislabelled, the one labelled
"Titleist" must then contain
Bridgestone balls and
the one labelled "Bridgestone"
must contain Callaway