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Question: Which of these games is fair?


A ) Toss a coin five times. You get 2 points for each head. Your friend gets 1 point for each head.
B ) Roll a dice 10 times. You win if you roll a 3 seven times. Your friend wins if she rolls a 3 five times.
C ) There are 5 gray, 5 black, and 5 blue marbles in a box. Sam wins if he chooses a blue marble thrice. Judy wins if she chooses a gray marble thrice.
D ) Put 9 green and 3 blue cubes in a bag. You win if you pick 2 green cubes at a time. Your friend wins if he picks 3 blue cubes at a time.

The right answer is Option C

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