Question

Ex1: A cookie jar has 3 red marbles and 1 white marble. A shoebox has 1 red
marble and 1 white marble. Three marbles are chosen at random without
replacement from the cookie jar and placed in the shoebox. Then 2 marbles
are chosen at random and without replacement from the shoebox. What is
the probability that both marbles chosen from the shoebox are red?​

Answer 1

If 2 red marbles and one white marbles come out from jar then the probability is 60 percent

If 3 red marbles come out then the probability is 80 percent