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Jar A, the transparent jar, contains exactly 11 black marbles and 9 white marbles. Jar B, the opaque jar, contains 20 black and white marbles in a proportion which is unknown to anyone.

In the experiment, you will select from pairs of wagers, each of which pertains to drawing a marble of a certain color from one of these jars. If you select a wager and the marble of the respective color is drawn from the respective jar, you will win $10 for that wager; if the other color is drawn, you will win nothing. For example, one of the wagers might be, “The marble drawn from Jar A will be white.” If you select this wager and a white marble is drawn, you will win $10; if you select this wager and a black marble is drawn, you will win nothing.

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