Praveen's Blog

An Eternal Quest for Incremental Improvement

Puzzle of the week - Week #52

There are three bags. First bag has 2 black balls, second one has 2 white balls and the third has a black ball and white ball. The labels for the bags are prepared as 2B, 2W and BW respectively. While fixing the labels, they were intentionally wrongly placed in all the bags and the bags are shuffled. You are allowed to pick one ball at a time from a bag. What is the minimum number of picks needed for labelling the bags correctly? How?