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Golf Pond
Thanks Tiger

golf ball sacks
Answer:
One 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 then would have either Callaway or Bridgestone golf balls in them.

Since all the sacks were mislabelled, the one labelled "Titleist" must then contain Bridgestone balls and the one labelled "Bridgestone" must contain Callaway golf balls
.

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