Mathematics
Mathematics, 12.11.2019 08:31, diegop07

Abox contains four red balls and eight black balls. two balls are randomly chosen from the box, and are not
replaced. let event b be choosing a black ball first and event r be choosing a red ball second.
what are the following probabilities?
p(b) =
p(rib) =
pbr) =
the probability that the first ball chosen is black and the second ball chosen is red is about percent.

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