suppose we have two urns, urn 1 and urn 2. urn 1 contains 7 red marbles and 11 white marbles. urn 2 contains 9 red marbles and 13 white marbles. the experiment consists of first choosing an urn with equally likely probability, and then drawing a marble from that urn. what is the probability of choosing urn 2 and a red marble? a) 0.2045 b) 0.3889 c) 0.3056 d) 0.5909 e) 0.1944 f) none of the above.
