Probability of colored chips drawn from an urn
An urn contains 8 red chips, 10 green chips, and 2 white chips. A chip is drawn and replaced, and then a second chip is drawn. What is the probability of: a. A white chip on the first draw? b. A white chip on the first draw and a red on the second? c. Two green chips being drawn? d. A red chip on the second draw, given tha