Well the solution is simple. Most of the people get this puzzles in the first attempt without any hint.
You need to pick at least 4 marbles from the jar in worst case scenario to make sure that you get two marbles of the same color.
In the worst case scenario you may get three different color marbles in the first three attempts. But at the fourth attempt you will get any one of the three colors and hence you will get a pair of the same color marble.
You need to pick at least 4 marbles from the jar in worst case scenario to make sure that you get two marbles of the same color.
In the worst case scenario you may get three different color marbles in the first three attempts. But at the fourth attempt you will get any one of the three colors and hence you will get a pair of the same color marble.
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