Mathematics, 16.10.2019 03:00 MengXiong1

An urn contains 5 green balls, 7 yellow balls and 8 blue balls. event a is defined as drawing a green ball on the first draw, and event b is defined as drawing a green ball on the second draw. if two balls are drawn from the urn, one after the other and not replaced, what is p(b|a) expressed in simplest form?

a.3/19
b.4/19
c.1/5
d.5/19

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