SOLUTION: A box contains 4 red cards, 6 blue cards and 10 green cards. What is the smallest number of cards we must take from the box to make sure that we have 2 red cards?

Question 1143860: A box contains 4 red cards, 6 blue cards and 10 green cards. What is the smallest number of cards we must take from the box to make sure that we have 2 red cards?
Answer by ikleyn(52794) (Show Source): You can put this solution on YOUR website!
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In the worst case, you will take 6 blue and 10 green cards first;


but then the next two cards INEVITABLY will be red.


ANSWER.  Whatever (6 + 10) + 2 = 18 card you take from the box, at least 2 of them will be red.

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