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Why were the mass and density of Pluto unknown until Charon was found?
Ivy League College
A prestigious group of eight private universities in the northeastern United States known for their rigorous academic programs and selective admissions.
Chess Set
A collection of game pieces and a board used for playing chess, a strategic two-player board game.
Black Pieces
In games like chess and checkers, the set of pieces designated by the color black, typically controlled by one of the two players.
Independent Events
Two events are independent if and only if the occurrence of one does not affect the probability of the other.
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