Balls in a Bag
In a bag, there are `70` identical balls of different colors: `20` blue, `20` red, `20` yellow, and the rest are black and white. What is the minimum number of balls that must be drawn from the bag without looking, to ensure that we have `10` balls of the same color?
Difficulty level (1 very easy - 10 very hard): 3
Topics:
Combinatorics
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Pigeonhole Principle
yinon yamin - 1 year ago