Weighted balls in bins strategy?
Consider three bins. Each bin contains many balls. In one of the bins, each ball weighs 2, in another bin each ball weighs 3, and in the last each weighs 5 [units are arbitrary]. We don't know which bin is which.
Find a way to take determine which bin is which with only one weighing. You may take as many balls from as many bins as you wish.
Bonus: since that should be fairly easy, can you find a description of ALL such strategies?
If I take x balls from one of the bins, I find weight 2x, 3x, or 5x; then I know the weight in the bin which I chose from, but not which of the other two bins is which. So this won't work.
If I take one ball from each bin, I get a weight of 10, but this doesn't help at all.
The generalizations to multiple bins and with different weights of balls is interesting, but I'm more interested presently with a general solution to this case.