Mathematics, 12.09.2019 18:10 hdkdkdbx

there are 20 tiles in a bag. of these, 9 are purple, 5 are black and the rest are white.
event a = drawing a white tile on the first draw
event b = drawing a black tile on the second draw
if two tiles are drawn from the bag one after the other and not replaced, what is p(b|a) expressed in simplest form?

there are 20 tiles in a bag. of these, 9 are purple, 5 are black and the rest are white.

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there are 20 tiles in a bag. of these, 9 are purple, 5 are black and the rest are white.
event...