The odds against picking a red marble out of a hat of marbles is 20: 1. a. (Tl - 1 mark) What is the probability of picking a red marble out of the hat? b. (Tl -1 mark) If 21 marbles were picked from the hat (with replacement), how many are expected to be red? c. {Tl -1 mark) What is the probability of selecting a red marble once when selecting 21 marbles (with replacement).