Question 1093962: Illa has 3 blue marbles, 8 white marbles and 7 red marbles in a drawer. All marbles are the same except their color. Illa is taking out marbles from the drawer without looking. What is the minimum number of marbles she has to take out to make sure she has 2 marbles of the same color ?
Answer by Gentle Phill(18)   (Show Source):
You can put this solution on YOUR website! If Illa gets 2 matching marbles at 2nd or third attempt, well, she's graced.
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However, a tendency is that her 1st 3 attempts will come out with different colours.
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Thus, putting the grace of luck aside, Illa can be sure that after 3 attempt with 3 different colours, her 4th trial will guarantee a matching pair.
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Answer = 4
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Your friend,
Francis.
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