[Hoshi]

لو سمحتم طريقة الحل :

Urn 1 contains 5 red balls and 3 black balls. Urn 2 contains 3 red balls and 1 black
ball. Urn 3 contains 4 red balls and 2 black balls. If an urn is selected at random and

a ball is drawn. Find the probability it will be red

?