Hi,
I have got following problem unsolved:
A jar contains 20 marbles : 4 red , 6 white and 10 blue. If you remove marbles one at a time, randomly, what is the minimum number that must be removed to be certain that you have at least 2 marbles of each color?
I think 14 marbles must be removed. This would leave us with only 6 marbles remaining and then we can be certain that we have atleast 2 marbles of each color.
However my answer is not correct. Somebody please guide me.
Zulfi.
I have got following problem unsolved:
A jar contains 20 marbles : 4 red , 6 white and 10 blue. If you remove marbles one at a time, randomly, what is the minimum number that must be removed to be certain that you have at least 2 marbles of each color?
I think 14 marbles must be removed. This would leave us with only 6 marbles remaining and then we can be certain that we have atleast 2 marbles of each color.
However my answer is not correct. Somebody please guide me.
Zulfi.