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7 December, 07:00

A basket contains 4 red balls and 6 black balls, if two balls are selected one after the other without replacement what is the probability that all balls are black?

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  1. 7 December, 07:15
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    4 red, and 6 black ... total of 10

    P (black) = 6/10 reduces to 3/5

    without replacement

    P (black) = 5/9

    P (both) = 3/5 * 5/9 = 15/45 reduces to 1/3 <==
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