There were 40 marbles in a bag. Some of the marbles were yellow, and the rest were black. For a game, 3/5 of the 40 marbles were chosen and 16 of these were black.
Use this information to answer the questions below.

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(a) How many of the bag's yellow marbles were chosen?
(b) How many of the bag's marbles were chosen?
(c) How many black marbles were in the bag before the game?