Please solve a task. We have 5 similar coins, 3 of those are real and weight the same, while 2 are fake. 1 fake coin is lighter and the other is heavier than the real ones. How many weighting operations we will need to find at least one real coin?
- 3
- -
- 2
- 2 - but it will fail if both fake coins weight the same as 2 good ones
- 3 worst case 2 best case
- 3
- At most 2
- 3
- 1 or 2