# Urn 1 contains 3 red and 6 blue balls, and urn 2 contains 4 red and…

Urn 1 contains 3 red and 6 blue balls, and urn 2 contains 4 red

and 3 blue balls. The urns are equally likely to be chosen.

a) If a blue ball is drawn, what is the probability that it came

from urn 1?

b) If a red ball is drawn, what is the probability that it came

from urn 2?