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Cards With Crosses

Flip the all card once now you have 14 circle up and 9 cross up. Devide in group of 14 and 9 randomly and flip all cards of group 9 you will get equal no of cross up in both side

Death by drawing?

Bag 1 contains only 1 white and rest in another bag . This arrangment maximizes the probability of a ball being white when a ball is drawn randomly out of two bags.